## NICOLO'

## SPAGNOLO

Notice board

Corso di Fisica, Canale M-Z, II Semestre, Corso di Laurea in Scienze Naturali (L-32)

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Office Hours

Lunedì 14-15
Venerdì 14-15
Dipartimento di Fisica, Edificio Fermi, stanza 116, primo piano

Professor CV

POSITION

From 01/11/2016

to 31/10/2019

(in corso)

Ricercatore a Tempo Determinato Tipologia A

Dipartimento di Fisica, Sapienza Università di Roma

Responsabile scientifico: Prof. Fabio Sciarrino

Programma di ricerca: Simulazione quantistica con fotonica integrata

Settore concorsuale: 02/B1

SSD: FIS/03

From 01/11/2015

to 31/10/2016

Assegno di Ricerca

Dipartimento di Fisica, Sapienza Università di Roma

RINNOVO Assegno di ricerca, Bando D.D. n. 111/2013 del 19/06/2013 Cat. B, Tip. II

Responsabile scientifico: Prof. Fabio Sciarrino

SSD: FIS/03

Titolo della Ricerca: Informazione quantistica sperimentale con fotonica integrata

Research activity in experimental integrated quantum photonics for quantum information and quantum simulation.

From 01/11/2013

to 31/10/2015 Assegno di Ricerca

Dipartimento di Fisica, Sapienza Università di Roma

Assegno di ricerca, Bando D.D. n. 111/2013 del 19/06/2013 Cat. B, Tip. II

Responsabile scientifico: Prof. Fabio Sciarrino

SSD: FIS/03

Titolo della Ricerca: Informazione quantistica sperimentale con fotonica integrata

Research activity in experimental integrated quantum photonics for quantum information and quantum simulation.

From 01/11/2012

to 31/10/2013 Assegno di Ricerca

Dipartimento di Fisica, Sapienza Università di Roma

Assegno di ricerca, Bando D.D. n. 94/12 del 18/07/2012 Cat. B, Tip. II

Responsabile scientifico: Prof. Fabio Sciarrino

SSD: FIS/03

Titolo della Ricerca: Informazione quantistica sperimentale con il momento angolare orbitale della luce

Research activity in experimental quantum optics and information. Application of the orbital angular momentum of light in the quantum sensing domain.

From 01/11/2011

to 31/10/2012 Assegno di Ricerca

Dipartimento di Fisica, Sapienza Università di Roma

Assegno di Ricerca, Bando D.D. n. 69/11 del 12/05/2011 Cat. B, Tip. I

Responsabile scientifico: Prof. Fabio Sciarrino

SSD: FIS/03

Titolo della Ricerca: Hybrid optical technologies for quantum information processing

Research activity in quantum information (both theory and experiments) on hybrid quantum systems for quantum information processing

Business or sector Research, quantum information

EDUCATION AND TRAINING

From 01/11/2008

to 08/02/2012 Dottorato di Ricerca in Scienze Fisiche della Materia

Università degli Studi di Roma Tre, Roma - CNISM

XXIV ciclo

Supervisor: Dott. Fabio Sciarrino (Sapienza Università di Roma)

Co-Supervisor: Prof. Francesco De Martini

PHD thesis

Title: Robust Quantum Optical States for Quantum Sensing and Entanglement Tests

PHD research activity: My research activity during the PhD focused on the generation, manipulation, and characterization of quantum states of the electromagnetic field, for their applications in fundamental tests of quantum mechanics and in quantum information protocols. The generation of multiphoton states through the process of optical parametric amplification has been investigated in the context of quantum entanglement and nonlocality, by exploiting both discrete and continuous variables detection techniques. The knowhow on the homodyne detection technique has been acquired within a training period at the Institut d'Optique in Palaiseau in the group of Prof. Grangier. The application of such multiphoton states within the context of optical sensing has been experimentally investigated.

From 05/01/2010

to 05/03/2010 Visiting student

Institut d'Optique, Palaiseau, France

Attendance to Courses on Semiconductor nonlinear optics, Biophotonics, Optoelectronics and Near-field microscopy

Research training in the quantum optics group of Prof. Grangier on experimental homodyne detection.

From A.A. 2006-2007

to A.A.2007-2008 Laurea Specialistica in Fisica [LS (DM 509/99) - ORDIN. 2007]-20/S

Sapienza Università di Roma

Curriculum of Matter Physics

Degree 110 e lode/110

Master thesis

Title: Entanglement Quantistico in Sistemi Micro-macroscopici

Supervisor: Prof. Francesco De Martini

From A.A. 2003-2004

to A.A. 2005-2006 Laurea Triennale in Fisica [L (DM 509/99) - ORDIN. 2002]-25

Sapienza Università di Roma

Degree 110 e lode/110

Dissertation thesis

Title: Caratterizzazione di stati entangled

Supervisors: Prof. Paolo Mataloni and Dott. Fabio Sciarrino

2003 Diploma di Maturità Scientifica

Liceo Scientifico Farnesina

Degree 100/100

PUBLICATIONS

Refereed Journal

[1] N. Spagnolo, C. Vitelli, S. Giacomini, F. Sciarrino, and F. De Martini, Polarization preserving ultra-fast optical shutter for quantum information processing, Opt. Expr. 16, 17609 (2008).

[2] F. De Martini, F. Sciarrino, N. Spagnolo, C. Vitelli, and F. S. Cataliotti, Macroscopic quantum entanglement in light reflection from Bose-Einstein condensates, Int. Journ. Quant. Inform. 7, 171 (2009).

[3] C. Vitelli, N. Spagnolo, F. Sciarrino, and F. De Martini, Amplification of polarization NOON states, JOSA B 26, 892 (2009).

[4] F. De Martini, F. Sciarrino, and N. Spagnolo, Decoherence, environment-induced superselection, and classicality of a macroscopic quantum superposition generated by quantum cloning, Phys. Rev. A 79, 052305 (2009).

[5] F. De Martini, F. Sciarrino, and N. Spagnolo, Anomalous Lack of Decoherence of the Macroscopic Quantum Superpositions based on Phase-Covariant Quantum Cloning, Phys. Rev. Lett. 103, 100501 (2009).

[6] N. Spagnolo, C. Vitelli, T. De Angelis, F. Sciarrino, and F. De Martini, Wigner function theory and decoherence of the quantum-injected optical parametric amplifier, Phys. Rev. A 80, 032318 (2009).

[7] C. Vitelli, N. Spagnolo, L. Toffoli, F. Sciarrino, and F. De Martini, Quantum-to-classical transition via fuzzy measurements on high gain spontaneous parametric down-conversion, Phys. Rev. A 81, 032123 (2010).

[8] F. De Martini, F. Sciarrino, N. Spagnolo, and C. Vitelli, Generation of Highly Resilient to Decoherence Macroscopic Quantum Superpositions via Phase-covariant Quantum Cloning, Found. Phys. 41, 492 (2010).

[9] C. Vitelli, N. Spagnolo, L. Toffoli, F. Sciarrino, F. De Martini, Enhanced Resolution of Lossy Interferometry by Coherent Amplification of Single Photons, Phys. Rev. Lett. 105, 113602 (2010).

[10] N. Spagnolo, F. Sciarrino, F. De Martini, Resilience to decoherence of the macroscopic quantum superpositions generated by universally covariant optimal quantum cloning, Phys. Rev. A 82, 032325 (2010).

[11] N. Spagnolo, C. Vitelli, F. Sciarrino, and F. De Martini, Entanglement criteria for microscopic-macroscopic systems, Phys. Rev. A 82, 052101 (2010).

[12] C. Vitelli, N. Spagnolo, F. Sciarrino, and F. De Martini, Measurement-induced quantum operations on multiphoton states, Phys. Rev. A 82, 062319 (2010).

[13] M. Barbieri, N. Spagnolo, M. G. Genoni, F. Ferreyrol, R. Blandino, M. G. A. Paris, P. Grangier, and R. Tualle-Brouri, Non-Gaussianity of quantum states: An experimental test on single-photon-added coherent states', Phys. Rev. A 82, 063833 (2010).

[14] F. Caruso, N. Spagnolo, C. Vitelli, F. Sciarrino, and M. B. Plenio, Simulation of noise-assisted transport via optical cavity networks, Phys. Rev. A 83, 013811 (2011).

[15] N. Spagnolo, C. Vitelli, M. Paternostro, F. De Martini, and F. Sciarrino, Hybrid methods for witnessing entanglement in a microscopic-macroscopic system, Phys. Rev. A 84, 032102 (2011).

[16] C. Vitelli, M. Terra-Cunha, N. Spagnolo, F. De Martini, F. Sciarrino, Continuous-variable nonlocality test performed over a multiphoton quantum state, Phys. Rev. A 85, 012104 (2012).

[17] N. Spagnolo, C. Vitelli, V. G. Lucivero, V. Giovannetti, L. Maccone, F. Sciarrino, Phase Estimation via Quantum Interferometry for Noisy Detectors, Phys. Rev. Lett. 108, 233602 (2012).

[18] N. Spagnolo, L. Aparo, C. Vitelli, A. Crespi, R. Ramponi, R. Osellame, P. Mataloni and F. Sciarrino, Quantum interferometry with three-dimensional geometry, Sci. Rep. 2, 862 (2012).

[19] F. Ferreyrol, N. Spagnolo, R. Blandino, M. Barbieri, and R. Tualle-Bruori, Heralded processes on continuous-variable spaces as quantum maps, Phys. Rev. A 86, 062327 (2012).

[20] N. Spagnolo, C. Vitelli, L. Aparo, P. Mataloni, F. Sciarrino, A. Crespi, R. Ramponi, and R. Osellame, Three-photon bosonic coalescence in an integrated tritter, Nature Communications 4, 1606 (2013).

[21] C. Vitelli, N. Spagnolo, L. Aparo, F. Sciarrino, E. Santamato and L. Marrucci, Joining the quantum state of two photons into one, Nature Photonics 7, 521 (2013).

[22] A. Crespi, R. Osellame, R. Ramponi, D. J. Brod, E. F. Galvao, N. Spagnolo, C. Vitelli, E. Maiorino, P. Mataloni, and F. Sciarrino, Integrated multimode interferometers with arbitrary designs for photonic boson sampling, Nature Photonics 7, 545 (2013).

[23] V. D'Ambrosio, N. Spagnolo, L. Del Re, S. Slussarenko, Y. Li, L. C. Kwek, L. Marrucci, S. P. Walborn, L. Aolita, and F. Sciarrino, Photonic polarization gears for ultra-sensitive angular measurements, Nature Communications 4, 2432 (2013).

[24] N. Spagnolo, C. Vitelli, L. Sansoni, E. Maiorino, P. Mataloni, F. Sciarrino, D. J. Brod, E. F. Galvão, A. Crespi, R. Ramponi, and R. Osellame, General Rules for Bosonic Bunching in Multimode Interferometers, Phys. Rev. Lett. 111, 130503 (2013).

[25] E. Passaro, C. Vitelli, N. Spagnolo, F. Sciarrino, E. Santamato, L. Marrucci, Joining and splitting the quantum state of photons, Phys. Rev. A 88, 062321 (2013).

[26] N. Spagnolo, C. Vitelli, M. Bentivegna, D. J. Brod, A. Crespi, F. Flamini, S. Giacomini, G. Milani, R. Ramponi, P. Mataloni, R. Osellame, E. F. Galvao, and F. Sciarrino, Experimental validation of photonic boson sampling, Nature Photonics 8, 615 (2014).

[27] M. Bentivegna, N. Spagnolo, C. Vitelli, D. J. Brod, A. Crespi, F. Flamini, R. Ramponi, P. Mataloni, R. Osellame, E. F. Galvao, and F. Sciarrino, Bayesian approach to Boson Sampling validation, Int. Journ. Quant. Inform. 12, 1560028 (2014).

[28] M. Bentivegna, N. Spagnolo, C. Vitelli, F. Flamini, N. Viggianiello, L. Latmiral, P. Mataloni, D. J. Brod, E. F. Galvao, A. Crespi, R. Ramponi, R. Osellame, and F. Sciarrino, Experimental scattershot boson sampling, Science Advances 1, e1400255 (2015).

[29] M. Barbieri, N. Spagnolo, F. Ferreyrol, R. Blandino, B. J. Smith, R. Tualle-Bruori, Qubit-Programmable Operations on Quantum Light Fields, Scientific Reports 5, 15125 (2015).

[30] F. Flamini, L. Magrini, A. S. Rab, N. Spagnolo, V. D'Ambrosio, P. Mataloni, F. Sciarrino, T. Zandrini, A. Crespi, R. Ramponi, R. Osellame, Thermally reconfigurable quantum photonic circuits at telecom wavelength by femtosecond laser micromachining, Light: Science & Applications 4, e354 (2015).

[31] A. Crespi, R. Osellame, R. Ramponi, M. Bentivegna, F. Flamini, N. Spagnolo, N. Viggianiello, L. Innocenti, P. Mataloni, F. Sciarrino, Suppression law of quantum states in a 3D photonic fast Fourier transform chip, Nature Communications 7, 10469 (2016).

[32] M. A. Ciampini, N. Spagnolo, C. Vitelli, L. Pezze, A. Smerzi, F. Sciarrino, Quantum-enhanced multiparameter estimation in multiarm interferometers, Scientific Reports 6, 28881 (2016).

[33] L. Latmiral, N. Spagnolo, F. Sciarrino, Towards quantum supremacy with lossy scattershot boson sampling, New J. Phys. 18, 113008 (2016).

[34] F. Flamini, N. Viggianiello, M. Bentivegna, N. Spagnolo, P. Mataloni, A. Crespi, R. Ramponi, R. Osellame, and F. Sciarrino, Generalized quantum fast transformations via femtosecond laser writing technique, Interdisciplinary Information Sciences 23, 115 (2017).

[35] L. Pezzè, M. A. Ciampini, N. Spagnolo, P. C. Humphreys, A. Datta, I. A. Walmsley, M. Barbieri, F. Sciarrino, and A. Smerzi, Optimal Measurements for Simultaneous Quantum Estimation of Multiple Phases, Phys. Rev. Lett. 119, 130504 (2017), selected as Editors suggestion.

[36] A. S. Rab, E. Polino, Z.-X. Man, N. Ba An, Y.-J. Xia, N. Spagnolo, R. Lo Franco, F. Sciarrino,

Entanglement of photons in their dual wave-particle nature, Nature Communications 8, 915 (2017).

[37] N. Spagnolo, E. Maiorino, C. Vitelli, M. Bentivegna, A. Crespi, R. Ramponi, P. Mataloni, R. Osellame, F. Sciarrino, Learning an unknown unitary transformation via a genetic approach, Scientific Reports 7, 14316 (2017).

[38] F. Flamini, N. Spagnolo, N. Viggianiello, A. Crespi, R. Osellame, F. Sciarrino, Benchmarking integrated linear-optical architectures for quantum information processing, Scientific Reports 7, 15133 (2017).

[39] I. Pitsios, L. Banchi, A. S. Rab, M. Bentivegna, D. Caprara, A. Crespi, N. Spagnolo, S. Bose, P. Mataloni, R. Osellame, F. Sciarrino, Photonic simulation of entanglement growth and engineering after a spin chain quench, Nature Communications 8, 1569 (2017).

[40] L. Innocenti, H. Majury, T. Giordani, N. Spagnolo, F. Sciarrino, M. Paternostro, A. Ferraro, Quantum state engineering using one-dimensional discrete-time quantum walk, Phys. Rev. A 96, 062326 (2017).

[41] T. Giordani, F. Flamini, M. Pompili, N. Viggianiello, N. Spagnolo, A. Crespi, R. Osellame, N. Wiebe, M. Walschaers, A. Buchleitner, F. Sciarrino, Experimental statistical signature of many-body quantum interference, Natute Photonics 12, 173-178 (2018).

[42] N. Viggianiello, F. Flamini, L. Innocenti, D. Cozzolino, M. Bentivegna, N. Spagnolo, A. Crespi, D. J. Brod, E. F. Galvao, R. Osellame, F. Sciarrino, Experimental generalized quantum suppression law in Sylvester interferometers, New J. Phys. 20, 033017 (2018).

[43] S. Atzeni, A. S. Rab, G. Corrielli, E. Polino, M. Valeri, P. Mataloni, N. Spagnolo, A. Crespi, F. Sciarrino, R. Osellame, Integrated sources of entangled photons at the telecom wavelength in femtosecond-laser-written circuits, Optica 5, 311-314 (2018).

[44] F. Flamini, N. Viggianiello, T. Giordani, M. Bentivegna, N. Spagnolo, A. Crespi, G. Corrielli, R. Osellame, M. A. Martin-Delgado, F. Sciarrino, Observation of photonic states dynamics in 3-D integrated Fourier circuits, Journal of Optics 20, 073002 (2018).

[45] I. Gianani, E. Polino, M. Sbroscia, A. S. Rab, E. Roccia, L. Mancino, N. Spagnolo, M. Barbieri, F. Sciarrino, Hong-Ou-Mandel control through spectral shaping, Journal of Optics 20, 085201 (2018).

Selected as Paper of the Week.

[46] A. Lumino, E. Polino, A. S. Rab, G. Milani, N. Spagnlo, N. Wiebe, F. Sciarrino, Experimental Phase Estimation Enhanced by Machine Learning, Physical Review Applied 10, 044033 (2018).

Selected as Editor Suggestion.

[47] N. Viggianiello, F. Flamini, M. Bentivegna, N. Spagnolo, A. Crespi, D. J. Brod, E. F. Galvao, R. Osellame, F. Sciarrino, Optimal photonic indistinguishability tests in multimode networks, Science Bulletin 63, 1470-1478 (2018).

[48] F. Flamini, N. Spagnolo, F. Sciarrino, Photonic quantum information processing: a review, Reports on Progress in Physics 82, 016001 (2019).

[49] T. Giordani, E. Polino, S. Emiliani, A. Suprano, L. Innocenti, H. Majury, L. Marrucci, M. Paternostro, A. Ferraro, N. Spagnolo, F. Sciarrino, Experimental engineering of arbitrary qudit states with discrete-time quantum walks, Physical Review Letters 122, 020503 (2019).

[50] I. Agresti, N. Viggianiello, F. Flamini, N. Spagnolo, A. Crespi, R. Osellame, N. Wiebe, F Sciarrino, Pattern recognition techniques for Boson Sampling validation, Physical Review X 9, 011013 (2019).

[51] D. J. Brod, E. F. Galvao, N. Viggianiello, F. Flamini, N. Spagnolo, F. Sciarrino, Witnessing Genuine Multiphoton Indistinguishability, Physical Review Letters 122, 063602 (2019).

[52] E. Polino, M. Riva, M. Valeri, R. Silvestri, G. Corrielli, A. Crespi, N. Spagnolo, R. Osellame, F. Sciarrino, Experimental multiphase estimation on a chip, Optica 6, 288-295 (2019).

[53] F. Flamini, N. Spagnolo, F. Sciarrino, Visual assessment of multi-photon interference, Quantum Science and Technology 4, 024008 (2019).

[54] D.J. Brod, E. F. Galvao, A. Crespi, R. Osellame, N. Spagnolo, F. Sciarrino, Photonic implementation of Boson Sampling: a review, Adv. Phot. 1, 034001 (2019)

[55] D. Cozzolino, E. Polino, M. Valeri, G. Carvacho, D. Bacco, N. Spagnolo, L. K. Oxenløwe, F. Sciarrino, Air-core fiber distribution of hybrid vector vortex-polarization entangled states, Adv. Phot. 1, 046005 (2019).

Conference Proceedings

[CP1] F. S. Cataliotti, F. De Martini, F. Sciarrino, N. Spagnolo, and C. Vitelli, Macroscopic quantum entanglement', Proc. SPIE 7092, 7092T (2008).

[CP2] C. Vitelli, N. Spagnolo, F. Sciarrino, and F. De Martini, Non Locality in a Micro-Macroscopic Photon System, AIP Conf. Proc. 1101, 29 (2009).

[CP3] N. Spagnolo, C. Vitelli, F. Sciarrino, and F. De Martini, Entanglement and Decoherence in a Microscopic-Macroscopic system, AIP Conf. Proc. 1110, 211 (2009).

[CP4] C. Vitelli, N. Spagnolo, F. Sciarrino, and F. De Martini, Micro-macro entangled photon systems: results and perspectives, Proc. SPIE 7355, 735508 (2009).

[CP5] N. Spagnolo, C. Vitelli, F. Sciarrino, and F. De Martini, Entanglement test in micro-macroscopic photon system: criteria and assumptions, AIP Conf. Proc. 1327, 221 (2011).

[CP6] N. Spagnolo, C. Vitelli, L. Toffoli, F. De Martini, and F. Sciarrino, Enhanced resolution in lossy phase estimation by optical parametric amplification, Proc. SPIE 8072, 80720M (2011).

[CP7] N. Spagnolo, C. Vitelli, L. Toffoli, F. Sciarrino, F. De Martini, Quantum-to-classical transition via fuzzy measurements on high gain spontaneous parametric down-conversion, AIP Conf. Proc. 1363, 193 (2011).

[CP8] C. Vitelli, N. Spagnolo, L. Toffoli, F. Sciarrino, F. De Martini, Enhanced resolution of lossy interferometry by coherent amplification of single photons, AIP Conf. Proc. 1363, 164 (2011).

[CP9] A. Crespi, R. Ramponi, D. J. Brod, E. F. Galvao, N. Spagnolo, C. Vitelli, L. Sansoni, F. Sciarrino, P. Mataloni, R. Osellame, Arbitrary integrated multimode interferometers for the elaboration of photonic qubits, Proc. SPIE 8972, 89720V (2014).

[CP10] F. Ferreyrol, N. Spagnolo, R. Blandino, M. Barbieri, R. Tualle-Brouri, Heralded processes on continuous-variable spaces as quantum maps, AIP Conf. Proc. 1633, 222 (2014).

[CP11] I. Pitsios, L. Banchi, A. S. Rab, A. Crespi, M. Bentivegna, D. Caprara, N. Spagnolo, P. Mataloni, S. Bose, R. Osellame, F. Sciarrino, Photonic Simulation of Entanglement Generation and Transfer in a Spin Chain, Conference on Lasers and Electro-Optics (2016).

[CP12] A. Crespi, R. Osellame, R. Ramponi, M. Bentivegna, F. Flamini, N. Spagnolo, N. Viggianiello, L. Innocenti, P. Mataloni, F. Sciarrino, Observing Multi-Photon Interference and Suppression Laws in 3D Photonic Chips, Conference on Lasers and Electro-Optics (2016).

[CP13] A. Crespi, R. Osellame, R. Ramponi, M. Bentivegna, F. Flamini, N. Spagnolo, N. Viggianiello, L. Innocenti, P. Mataloni, F. Sciarrino, Observing quantum interference in 3D integrated-photonic symmetric multiports, Proc. SPIE 10106, 101061C (2017).

[CP14] N. Spagnolo, A. Lumino, E. Polino, A. S. Rab, N. Wiebe, F. Sciarrino, Machine Learning for Quantum Metrology, Proceedings 12, 28 (2019).

Other publications

[O1] L. Marrucci, C. Vitelli, N. Spagnolo, F. Sciarrino, Quantum multiplexing in single photons, SPIE Newsroom (2013), DOI: 10.1117/2.1201308.005020.

[O2] L. Sansoni, N. Spagnolo, C. Vitelli, F. Sciarrino, P. Mataloni, Simulating quantum physics by integrated photonic circuits, Il Nuovo Saggiatore Vol.29, No. 5-6, p. 5-16 (2013).

[O3] M. Bentivegna, N. Spagnolo, F. Sciarrino, Is my boson sampler working?, New J. Phys. 18, 041001 (2016).

[O4] N. Spagnolo, F. Sciarrino, The race for quantum supremacy: pushing the classical limit for the photonic hardware, National Science Review, nwy125 (2018), advance online publication.

Preprints

[AR1] F. Flamini, M. Walschaers, N. Spagnolo, N. Wiebe, A. Buchleitner, F. Sciarrino, Requirements for the validation of a quantum advantage in Boson Sampling, [arXiv:1904.12318]

[AR2] V. Cimini, I. Gianani, N. Spagnolo, F. Leccese, F. Sciarrino, M. Barbieri, Calibration of quantum sensors by neural networks, [arXiv:1904.10392]

[AR3] T. Giordani, D. J. Brod, C. Esposito, N. Viggianiello, M. Romano, F. Flamini, G. Carvacho, N. Spagnolo, E. F. Galvao, F. Sciarrino, Experimental quantification of genuine four-photon indistinguishability, [arXiv:1907.01325]

SCIENTIFIC ACHIEVEMENTS

Data Base: ISI Web of Science

Total citations: 1463

h-index: 19

Data Base: Google Scholar

Total citations: 1435

h-index: 25

PATENTS

-) Coauthor of Italian Patent: Tiltmetro fotonico ultra-sensibile utilizzante il momento angolare orbitale della luce, e relative metodo di misura angolare V. D'Ambrosio, N. Spagnolo, L. Del Re, S. Slussarenko, L. Marrucci, Y. Ling, C. Kwek, S. Walborn, L. Aolita, F. Sciarrino (2013) [n.RM2013A000318]

-) Coauthor of European Patent: Tiltmetro fotonico ultra-sensibile utilizzante il momento angolareorbitale della luce, e relative metodo di misura angolare V. D'Ambrosio, N. Spagnolo, L. Del Re, S. Slussarenko, L. Marrucci, Y. Ling, C. Kwek, S. Walborn, L. Aolita, F. Sciarrino (2013) [application no. EP 2811258 A1].

PRESENTATIONS AT CONFERENCES AND MEETINGS

Invited Talks: 8

I1) Conference Quantum 2019, From Foundations of Quantum Mechanics to Quantum Information and Quantum Metrology & Sensing, Turin, Italy, 26 May-1 June 2019.

Invited contribution: ``Validation of multiphoton interference via machine learning"

I2) ESA Workshop Quantum Processing of Big Data: from Quantum computing to Earth observation, Rome, Italy, 3 April 2019.

I3) Workshop on Quantum Technologies in Optronics, Toulouse, France, 12 March 2019.

Invited contribution: ``Integrated photonic platform for quantum multiphase estimation"

I4) Workshop Quantum Photonic Technologies for Space, Bern, Switzerland, 8-10 October 2018.

Invited contribution: ``Integrated quantum photonics for manipulation of photonic quantum states".

I5) 11th Italian Quantum Information Science Conference, Catania, Italy, 17-20 September 2018.

Invited contribution: ``Machine Learning for Quantum Metrology''.

I6) 10th Italian Quantum Information Science Conference, Florence, Italy, 12-15 September 2017.

Invited contribution: ``Validation of Boson Sampling experiments''.

I7) Conference IQIS 2014, Salerno, Italy, 15-19 September 2014.

Invited contribution: Efficient experimental validation of photonic boson sampling .

I8) International Workshop on Singularities and Topological Structures of Light, ICTP, Trieste, Italy, 8-12 July 2013.

Invited contribution:``The Photonics gear: from alignment free quantum communication to super-sensitive quantum correlations''.

Contributed Talks: 16

C1) Conference CLEO Europe/EQEC 2019, Munich, Germany, 23-27 June 2019.

Oral presentation: Experimental multiphase estimation in an integrated multi-arm interferometer .

C2) Conference QTech 2018, Paris, France, 5-7 September 2018.

Oral presentation: Phase estimation enhanced by machine learning

C3) Conference Quantum Simulation and Computation, Bilbao, Spain, 12-16 February 2018.

Oral presentation: Integrated Photonic quantum simulation of spin chain dynamics

C4) Conference CLEO Europe/EQEC 2017, Munich, Germany, 25-29 June 2017.

Oral presentation: Quantum simulation of spin chain dynamics via integrated photonics .

C5) Conference CLEO Europe/EQEC 2015, Munich, Germany, 21-25 June 2015.

Oral presentation: Validation of boson sampling experiments .

C6) Conference CLEO Europe/EQEC 2015, Munich, Germany, 21-25 June 2015.

Oral presentation: Photonic gears for ultra-sensitive angular measurements .

C7) PICQUE Workshop in Integrated Quantum Photonics, Oxford, United Kingdom, 7-9 June 2015.

Oral presentation: Experimental Boson Samping with integrated photonics .

C8) Conference CEWQO 2014, Brussels, Belgium, 23-27 June 2014.

Oral presentation: "Experimental Boson Sampling with integrated photonics".

C9) Workshop on Quantum Simulations, Centro de Ciencas de Benasque, Benasque, Spain, 29 September- 4 October 2013.

Oral presentation: "Experimental Boson Sampling".

C10) Phorbitech 3rd Annual Meeting, Glasgow, UK, 6 June 2013.

Oral presentation: "Joining the quantum state of two photons into one"

C11) CLEO Europe - IQEC 2013, Munich, Germany, 12-16 May 2013.

Oral presentation: "Integrated quantum interferometry with three-dimensional geometry".

C12) Phorbitech 2nd Review Meeting, Napoli, Italy, 23 November 2012.

Oral presentation: "Quantum state merging in photons"

C13) XCVII Congresso Nazionale della Società Italiana di Fisica, L'Aquila, Italy, 26-30 September 2011.

Oral presentation: ``Hybrid techniques for witnessing entanglement in a microscopic-macroscopic system''.

C14) Conference CLEO Europe/EQEC 2011, ICM Centre, Munich, Germany, 22-26 May 2011.

Oral presentation: ``Detecting nonlocality in macroscopic systems''.

C15) Conferenza Fotonica 2011, Palazzo Ducale, Genova, Italy, 9-11 May 2011.

9

Oral presentation: ``Enhanced resolution in lossy phase estimation by optical parametric amplification''.

C16) Spie Optics+Optoelectronics, Prague Congress Center, Prague, Czech Republic, 18-21 April 2011.

Oral presentation: ``Enhanced resolution in lossy phase estimation by optical parametric amplification''.

Poster Presentations: 13

TEACHING

- Assistant to Course: Laboratorio di Meccanica , Prof. Cesare Cametti, A.A. 2011/2012, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma.

- Seminars to Course: Ottica nonlineare e quantistica , Prof. Paolo Mataloni, A.A. 2011/2012, A.A. 2012/2013, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma.

- Seminars to Course: Informazione e Computazione Quantistica , Prof. Fabio Sciarrino, A.A. 2011/2012, A.A. 2012/2013, A.A, 2013/2014, A.A. 2014/2015, I semestre, Corso di Laurea Magistrale in Fisica, Sapienza Università di Roma.

- Assistant to Course: Elettromagnetismo , Prof. Fulvio Ricci, A.A. 2012/2013, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma.

- Assistant to Master Class di Ottica 2013 and 2014 within PLS project, Prof. Fabio Sciarrino

- Assistant to Course: Laboratorio di Meccanica , Prof. Fabio Sciarrino, A.A. 2014/2015, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma.

- Assistant to Course: Laboratorio di Meccanica , Prof. Fabio Sciarrino, A.A. 2015/2016, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma.

- Co-Docente: Ottica e Laboratorio , Prof. Antonio Polimeni and Prof. Fabio Sciarrino, A.A. 2016/2017, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma. Responsible for: 6 CFU

- Co-Docente: Ottica e Laboratorio , Prof. Antonio Polimeni and Prof. Fabio Sciarrino, A.A. 2017/2018, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma. Responsible for: 6 CFU

- Co-Docente: Ottica e Laboratorio , Prof. Antonio Polimeni and Prof. Fabio Sciarrino, A.A. 2018/2019, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma. Responsible for: 6 CFU

FUNDING

Project Title: Efficient photon source for telecom wavelength

Supported by: Bando di Ricerca Scientifica Anno 2014

Progetti di avvio alla Ricerca

Tipologia B

Sapienza Università di Roma

Grant: Euro 2500

FFABR 2017 (Fondo di Finanziamento delle Attività di Base di Ricerca)

Supported by: ANVUR

Grant: Euro 3000

SINFONIA Trattamento SIcuro dei dati mediante l INFOrmazione con singoli fotoNI A richiesta

Lazio Innova, Regione Lazio.

Coordinator: Prof. Antonio Polimeni

Grant: 149802,60 Euro

Project Title: Multiphase estimation in multiarm interferometers

Supported by: Bando di Ricerca Scientifica Anno 2018

Progetti Piccoli

Sapienza Università di Roma

Grant: Euro 4000

PARTICIPATION TO OTHER PROJECTS

During the scientific activity as a PhD student and as a Research Fellow, I worked as a part of the Sapienza research unit lead by Prof. Fabio Sciarrino to the following research projects:

- FET-Open Program, within the 7th Framework Programme of the European Commission under Grant no. 255914, PHORBITECH, Coordinator of the Sapienza research unit: Prof. Fabio Sciarrino.

- European Research Council (ERC)-Starting Grant 3D-QUEST, 3D-Quantum Integrated Optical Simulation, grant agreement no. 307783, http://www.3dquest.eu. Principal investigator: Prof. Fabio Sciarrino.

- H2020-FETPROACT-2014 Grant QUCHIP, Quantum Simulation on a Photonic Chip, grant agreement no. 641039, http://www.quchip.eu. Principal Investigator: Prof. Fabio Sciarrino

- ERC Advanced Grant 2015 CAPABLE (Composite integrated photonic platform by femtosecond laser micromachining), Principal Investigator: Prof. Roberto Osellame. PI of Rome Unit: Prof. Fabio Sciarrino.

- ERC Advanced Grant 2015 PHOSPHOR (Photonics of Spin-Orbit Optical Phenomena), Principal Investigator: Prof. Lorenzo Marrucci. PI of Rome Unit: Prof. Fabio Sciarrino.

AWARDS

2013 Poster Award at conference: ICOAM 2013, Glasgow, UK, 3-5 June, 2013

Poster title: Two-photon quantum state joining into one

2013 Poster Award at conference QIPC 2013, Firenze, Italy, 30 June-5 July 2013.

Poster title: Experimental boson sampling

ABILITAZIONE SCIENTIFICA NAZIONALE

Abilitazione Scientifica Nazionale (ASN) come professore di II fascia.

From 30/03/2018 to 30/03/2024

REFEREE ACTIVITY

- Referee for several journals:

Nature Photonics, Nature Physics, Nature Communications, Optica, Physical Review Letters, Physical Review A, Quantum Science and Technology, Scientific Reports, Entropy.

- Guest Editor of Special Issue Quantum Information processing on International Journal Entropy (MDPI, IF: 2.305): https://www.mdpi.com/journal/entropy/special_issues/QIP

SUMMARY OF RESEARCH ACTIVITY

1) PhD research activity

My research activity during the PhD focused on the generation, manipulation, and characterization of quantum states of the electromagnetic field, for their applications in fundamental tests of quantum mechanics and in quantum information protocols. The generation of multiphoton states through the process of optical parametric amplification has been investigated in the several contexts.

- The possibility of observing quantum properties for increasing size of the system, that is, by increasing the number of involved photons, has been analyzed. I carried out an analysis on the resilience to losses of the multiphoton states generated by optical parametric amplification, showing that these states present some robustness with respect to noise.

- A detailed analysis of a specific system has been carried out. This system is obtained starting from an entangled pair: one of the two photon undergoes an amplification process and its properties are transferred to a multiphoton state. Such system has been adopted as a possible benchmark to investigate the quantum-to-classical transition. Within this platform, I contributed in investigating theoretically the possibility of observing quantum entanglement for increasing number of photons, by exploiting both discrete and continuous variables detection techniques.

- During the training period at the Institut d'Optique in Palaiseau in the group of Prof. Grangier, one of the world leading group in the field, I had the opportunity to acquire experimental skills on the homodyne detection technique.

- Starting from the initial results on the robustness to losses of the multiphoton states generated by optical parametric amplification, the experimental application of such process within the context of optical sensing has been experimentally investigated. In particular, a protocol to exploit the ampification process to protect the information written in a probe state for the measurement of an optical phase has been devised. My contribution on this protocol was both on the experimental side, by participating in the development of the platform, and on the theoretical side, by analyzing and verifying the optimality of the protocol.

2) Post-doctoral research activity

During the Research Fellowship and RTD-A periods in Sapienza Università di Roma, my research activity focused on the experimental implementation of quantum information and quantum simulations protocols with different photonic platforms.

In a first part of my activity, attention has been devoted to hybrid optical systems, aimed at exploiting different degrees of freedom of the light. Some of the main results have been:

- The experimental implementation of a novel quantum information protocol to transfer two qubits of information from 2 photons into 2 degrees of freedom of a single photon has been performed. I contributed in developing a feasible experimental interferometric scheme for the protocol, with the requirement of being self-stabilized to avoid the need of any active phase-stabilization system. A News and Views article on Nature Photonics has been dedicated to these results: J. S. Neergaard-Nielsen, Nature Photonics 7, 512 513 (2013).

- A protocol to increase the sensitivity in the measurement of a roll angle has been experimentally implemented. This method exploits the adoption of hybrid states encoded in both the polarization and the orbital angular momentum of the light. In particular, I analyzed the performances achieved by this protocol in the general context of quantum phase estimation.

Recently the implementation of multiphoton experiments in integrated optical circuits has been addressed. Some of the main results include:

- The observation of three-photon interference has been reported in an integrated three-port splitter realized by the femtosecond laser-writing technique. This was the first reported implementation of a three-photon bosonic coalescence experiment. I contributed in performing the quantum three-photon measurements.

- The application of the integrated multiport splitters in the context of phase estimation has been theoretically analyzed, both for single-parameter estimation and the novel field of quantum multiparameter estimation.

- The implementation of the boson samping problem has been addressed. This computational problem is defined as sampling the output distribution of a system of boson evolving under a unitary transformation. This protocol represents a promising candidate of a dedicated system build to reach a regime where a quantum device solves the problem faster than its classical counterpart. I contributed in performing the quantum three-photon measurements in a 5-mode integrated interformeter. These results received a News and Views article:T. C. Ralph, Nature Photonics 7, 514 515 (2013).

- The validation of a Boson Sampling device, due to its computational complexity, is a non-trivial problem. First tests on its validation have been experimentally performed up to three photon in integrated interferometer with up to 13 modes. I contributed in performing the quantum measurements and in developing a validation test against the hypothesis of distinguishable photons.

- Recently, an extension of the boson sampling problem named Scattershot Boson Sampling has been theoretically proposed, and it has been shown to provide in principle an exponential enhancement with respect to the conventional problem. During my activity as a research fellow I contributed to the first experimental implementation of this protocol within an integrated photonics platform.

More recents results include:

- the experimental observation of a suppression law in integrated Fourier and Sylvester interferometers,

- the photonic simulation on an integrated platform of entanglement growth in a spin chain quench.

- the first implementation of a reconfigurable integrated circuit in the telecom domain have been reported. This work received a research highlight on Nature Photonics: N. Horiuchi, Nature Photonics 10, 73 (2016).

- realization and characterization of a modular integrated source of entangled photon pairs in polarization or path degrees of freedom

- further analysis on validation techniques for Boson Samping experiments

- analysis on the characterization and optimal architectures for integrated photonic interferometers

- theoretical analysis on optimal measurements for multiparameter estimation, paper selected as Editors suggestion in Physical Review Letters.

- experimental implementation of a novel protocol to generated entangled photon pairs in their dual wave-particle nature.

- single-photon and multiparameter estimation experiments

- application of machine learning for quantum experiments, including device certification, quantum state engineering, and adaptive control of quantum systems for quantum metrology.

From 01/11/2016

to 31/10/2019

(in corso)

Ricercatore a Tempo Determinato Tipologia A

Dipartimento di Fisica, Sapienza Università di Roma

Responsabile scientifico: Prof. Fabio Sciarrino

Programma di ricerca: Simulazione quantistica con fotonica integrata

Settore concorsuale: 02/B1

SSD: FIS/03

From 01/11/2015

to 31/10/2016

Assegno di Ricerca

Dipartimento di Fisica, Sapienza Università di Roma

RINNOVO Assegno di ricerca, Bando D.D. n. 111/2013 del 19/06/2013 Cat. B, Tip. II

Responsabile scientifico: Prof. Fabio Sciarrino

SSD: FIS/03

Titolo della Ricerca: Informazione quantistica sperimentale con fotonica integrata

Research activity in experimental integrated quantum photonics for quantum information and quantum simulation.

From 01/11/2013

to 31/10/2015 Assegno di Ricerca

Dipartimento di Fisica, Sapienza Università di Roma

Assegno di ricerca, Bando D.D. n. 111/2013 del 19/06/2013 Cat. B, Tip. II

Responsabile scientifico: Prof. Fabio Sciarrino

SSD: FIS/03

Titolo della Ricerca: Informazione quantistica sperimentale con fotonica integrata

Research activity in experimental integrated quantum photonics for quantum information and quantum simulation.

From 01/11/2012

to 31/10/2013 Assegno di Ricerca

Dipartimento di Fisica, Sapienza Università di Roma

Assegno di ricerca, Bando D.D. n. 94/12 del 18/07/2012 Cat. B, Tip. II

Responsabile scientifico: Prof. Fabio Sciarrino

SSD: FIS/03

Titolo della Ricerca: Informazione quantistica sperimentale con il momento angolare orbitale della luce

Research activity in experimental quantum optics and information. Application of the orbital angular momentum of light in the quantum sensing domain.

From 01/11/2011

to 31/10/2012 Assegno di Ricerca

Dipartimento di Fisica, Sapienza Università di Roma

Assegno di Ricerca, Bando D.D. n. 69/11 del 12/05/2011 Cat. B, Tip. I

Responsabile scientifico: Prof. Fabio Sciarrino

SSD: FIS/03

Titolo della Ricerca: Hybrid optical technologies for quantum information processing

Research activity in quantum information (both theory and experiments) on hybrid quantum systems for quantum information processing

Business or sector Research, quantum information

EDUCATION AND TRAINING

From 01/11/2008

to 08/02/2012 Dottorato di Ricerca in Scienze Fisiche della Materia

Università degli Studi di Roma Tre, Roma - CNISM

XXIV ciclo

Supervisor: Dott. Fabio Sciarrino (Sapienza Università di Roma)

Co-Supervisor: Prof. Francesco De Martini

PHD thesis

Title: Robust Quantum Optical States for Quantum Sensing and Entanglement Tests

PHD research activity: My research activity during the PhD focused on the generation, manipulation, and characterization of quantum states of the electromagnetic field, for their applications in fundamental tests of quantum mechanics and in quantum information protocols. The generation of multiphoton states through the process of optical parametric amplification has been investigated in the context of quantum entanglement and nonlocality, by exploiting both discrete and continuous variables detection techniques. The knowhow on the homodyne detection technique has been acquired within a training period at the Institut d'Optique in Palaiseau in the group of Prof. Grangier. The application of such multiphoton states within the context of optical sensing has been experimentally investigated.

From 05/01/2010

to 05/03/2010 Visiting student

Institut d'Optique, Palaiseau, France

Attendance to Courses on Semiconductor nonlinear optics, Biophotonics, Optoelectronics and Near-field microscopy

Research training in the quantum optics group of Prof. Grangier on experimental homodyne detection.

From A.A. 2006-2007

to A.A.2007-2008 Laurea Specialistica in Fisica [LS (DM 509/99) - ORDIN. 2007]-20/S

Sapienza Università di Roma

Curriculum of Matter Physics

Degree 110 e lode/110

Master thesis

Title: Entanglement Quantistico in Sistemi Micro-macroscopici

Supervisor: Prof. Francesco De Martini

From A.A. 2003-2004

to A.A. 2005-2006 Laurea Triennale in Fisica [L (DM 509/99) - ORDIN. 2002]-25

Sapienza Università di Roma

Degree 110 e lode/110

Dissertation thesis

Title: Caratterizzazione di stati entangled

Supervisors: Prof. Paolo Mataloni and Dott. Fabio Sciarrino

2003 Diploma di Maturità Scientifica

Liceo Scientifico Farnesina

Degree 100/100

PUBLICATIONS

Refereed Journal

[1] N. Spagnolo, C. Vitelli, S. Giacomini, F. Sciarrino, and F. De Martini, Polarization preserving ultra-fast optical shutter for quantum information processing, Opt. Expr. 16, 17609 (2008).

[2] F. De Martini, F. Sciarrino, N. Spagnolo, C. Vitelli, and F. S. Cataliotti, Macroscopic quantum entanglement in light reflection from Bose-Einstein condensates, Int. Journ. Quant. Inform. 7, 171 (2009).

[3] C. Vitelli, N. Spagnolo, F. Sciarrino, and F. De Martini, Amplification of polarization NOON states, JOSA B 26, 892 (2009).

[4] F. De Martini, F. Sciarrino, and N. Spagnolo, Decoherence, environment-induced superselection, and classicality of a macroscopic quantum superposition generated by quantum cloning, Phys. Rev. A 79, 052305 (2009).

[5] F. De Martini, F. Sciarrino, and N. Spagnolo, Anomalous Lack of Decoherence of the Macroscopic Quantum Superpositions based on Phase-Covariant Quantum Cloning, Phys. Rev. Lett. 103, 100501 (2009).

[6] N. Spagnolo, C. Vitelli, T. De Angelis, F. Sciarrino, and F. De Martini, Wigner function theory and decoherence of the quantum-injected optical parametric amplifier, Phys. Rev. A 80, 032318 (2009).

[7] C. Vitelli, N. Spagnolo, L. Toffoli, F. Sciarrino, and F. De Martini, Quantum-to-classical transition via fuzzy measurements on high gain spontaneous parametric down-conversion, Phys. Rev. A 81, 032123 (2010).

[8] F. De Martini, F. Sciarrino, N. Spagnolo, and C. Vitelli, Generation of Highly Resilient to Decoherence Macroscopic Quantum Superpositions via Phase-covariant Quantum Cloning, Found. Phys. 41, 492 (2010).

[9] C. Vitelli, N. Spagnolo, L. Toffoli, F. Sciarrino, F. De Martini, Enhanced Resolution of Lossy Interferometry by Coherent Amplification of Single Photons, Phys. Rev. Lett. 105, 113602 (2010).

[10] N. Spagnolo, F. Sciarrino, F. De Martini, Resilience to decoherence of the macroscopic quantum superpositions generated by universally covariant optimal quantum cloning, Phys. Rev. A 82, 032325 (2010).

[11] N. Spagnolo, C. Vitelli, F. Sciarrino, and F. De Martini, Entanglement criteria for microscopic-macroscopic systems, Phys. Rev. A 82, 052101 (2010).

[12] C. Vitelli, N. Spagnolo, F. Sciarrino, and F. De Martini, Measurement-induced quantum operations on multiphoton states, Phys. Rev. A 82, 062319 (2010).

[13] M. Barbieri, N. Spagnolo, M. G. Genoni, F. Ferreyrol, R. Blandino, M. G. A. Paris, P. Grangier, and R. Tualle-Brouri, Non-Gaussianity of quantum states: An experimental test on single-photon-added coherent states', Phys. Rev. A 82, 063833 (2010).

[14] F. Caruso, N. Spagnolo, C. Vitelli, F. Sciarrino, and M. B. Plenio, Simulation of noise-assisted transport via optical cavity networks, Phys. Rev. A 83, 013811 (2011).

[15] N. Spagnolo, C. Vitelli, M. Paternostro, F. De Martini, and F. Sciarrino, Hybrid methods for witnessing entanglement in a microscopic-macroscopic system, Phys. Rev. A 84, 032102 (2011).

[16] C. Vitelli, M. Terra-Cunha, N. Spagnolo, F. De Martini, F. Sciarrino, Continuous-variable nonlocality test performed over a multiphoton quantum state, Phys. Rev. A 85, 012104 (2012).

[17] N. Spagnolo, C. Vitelli, V. G. Lucivero, V. Giovannetti, L. Maccone, F. Sciarrino, Phase Estimation via Quantum Interferometry for Noisy Detectors, Phys. Rev. Lett. 108, 233602 (2012).

[18] N. Spagnolo, L. Aparo, C. Vitelli, A. Crespi, R. Ramponi, R. Osellame, P. Mataloni and F. Sciarrino, Quantum interferometry with three-dimensional geometry, Sci. Rep. 2, 862 (2012).

[19] F. Ferreyrol, N. Spagnolo, R. Blandino, M. Barbieri, and R. Tualle-Bruori, Heralded processes on continuous-variable spaces as quantum maps, Phys. Rev. A 86, 062327 (2012).

[20] N. Spagnolo, C. Vitelli, L. Aparo, P. Mataloni, F. Sciarrino, A. Crespi, R. Ramponi, and R. Osellame, Three-photon bosonic coalescence in an integrated tritter, Nature Communications 4, 1606 (2013).

[21] C. Vitelli, N. Spagnolo, L. Aparo, F. Sciarrino, E. Santamato and L. Marrucci, Joining the quantum state of two photons into one, Nature Photonics 7, 521 (2013).

[22] A. Crespi, R. Osellame, R. Ramponi, D. J. Brod, E. F. Galvao, N. Spagnolo, C. Vitelli, E. Maiorino, P. Mataloni, and F. Sciarrino, Integrated multimode interferometers with arbitrary designs for photonic boson sampling, Nature Photonics 7, 545 (2013).

[23] V. D'Ambrosio, N. Spagnolo, L. Del Re, S. Slussarenko, Y. Li, L. C. Kwek, L. Marrucci, S. P. Walborn, L. Aolita, and F. Sciarrino, Photonic polarization gears for ultra-sensitive angular measurements, Nature Communications 4, 2432 (2013).

[24] N. Spagnolo, C. Vitelli, L. Sansoni, E. Maiorino, P. Mataloni, F. Sciarrino, D. J. Brod, E. F. Galvão, A. Crespi, R. Ramponi, and R. Osellame, General Rules for Bosonic Bunching in Multimode Interferometers, Phys. Rev. Lett. 111, 130503 (2013).

[25] E. Passaro, C. Vitelli, N. Spagnolo, F. Sciarrino, E. Santamato, L. Marrucci, Joining and splitting the quantum state of photons, Phys. Rev. A 88, 062321 (2013).

[26] N. Spagnolo, C. Vitelli, M. Bentivegna, D. J. Brod, A. Crespi, F. Flamini, S. Giacomini, G. Milani, R. Ramponi, P. Mataloni, R. Osellame, E. F. Galvao, and F. Sciarrino, Experimental validation of photonic boson sampling, Nature Photonics 8, 615 (2014).

[27] M. Bentivegna, N. Spagnolo, C. Vitelli, D. J. Brod, A. Crespi, F. Flamini, R. Ramponi, P. Mataloni, R. Osellame, E. F. Galvao, and F. Sciarrino, Bayesian approach to Boson Sampling validation, Int. Journ. Quant. Inform. 12, 1560028 (2014).

[28] M. Bentivegna, N. Spagnolo, C. Vitelli, F. Flamini, N. Viggianiello, L. Latmiral, P. Mataloni, D. J. Brod, E. F. Galvao, A. Crespi, R. Ramponi, R. Osellame, and F. Sciarrino, Experimental scattershot boson sampling, Science Advances 1, e1400255 (2015).

[29] M. Barbieri, N. Spagnolo, F. Ferreyrol, R. Blandino, B. J. Smith, R. Tualle-Bruori, Qubit-Programmable Operations on Quantum Light Fields, Scientific Reports 5, 15125 (2015).

[30] F. Flamini, L. Magrini, A. S. Rab, N. Spagnolo, V. D'Ambrosio, P. Mataloni, F. Sciarrino, T. Zandrini, A. Crespi, R. Ramponi, R. Osellame, Thermally reconfigurable quantum photonic circuits at telecom wavelength by femtosecond laser micromachining, Light: Science & Applications 4, e354 (2015).

[31] A. Crespi, R. Osellame, R. Ramponi, M. Bentivegna, F. Flamini, N. Spagnolo, N. Viggianiello, L. Innocenti, P. Mataloni, F. Sciarrino, Suppression law of quantum states in a 3D photonic fast Fourier transform chip, Nature Communications 7, 10469 (2016).

[32] M. A. Ciampini, N. Spagnolo, C. Vitelli, L. Pezze, A. Smerzi, F. Sciarrino, Quantum-enhanced multiparameter estimation in multiarm interferometers, Scientific Reports 6, 28881 (2016).

[33] L. Latmiral, N. Spagnolo, F. Sciarrino, Towards quantum supremacy with lossy scattershot boson sampling, New J. Phys. 18, 113008 (2016).

[34] F. Flamini, N. Viggianiello, M. Bentivegna, N. Spagnolo, P. Mataloni, A. Crespi, R. Ramponi, R. Osellame, and F. Sciarrino, Generalized quantum fast transformations via femtosecond laser writing technique, Interdisciplinary Information Sciences 23, 115 (2017).

[35] L. Pezzè, M. A. Ciampini, N. Spagnolo, P. C. Humphreys, A. Datta, I. A. Walmsley, M. Barbieri, F. Sciarrino, and A. Smerzi, Optimal Measurements for Simultaneous Quantum Estimation of Multiple Phases, Phys. Rev. Lett. 119, 130504 (2017), selected as Editors suggestion.

[36] A. S. Rab, E. Polino, Z.-X. Man, N. Ba An, Y.-J. Xia, N. Spagnolo, R. Lo Franco, F. Sciarrino,

Entanglement of photons in their dual wave-particle nature, Nature Communications 8, 915 (2017).

[37] N. Spagnolo, E. Maiorino, C. Vitelli, M. Bentivegna, A. Crespi, R. Ramponi, P. Mataloni, R. Osellame, F. Sciarrino, Learning an unknown unitary transformation via a genetic approach, Scientific Reports 7, 14316 (2017).

[38] F. Flamini, N. Spagnolo, N. Viggianiello, A. Crespi, R. Osellame, F. Sciarrino, Benchmarking integrated linear-optical architectures for quantum information processing, Scientific Reports 7, 15133 (2017).

[39] I. Pitsios, L. Banchi, A. S. Rab, M. Bentivegna, D. Caprara, A. Crespi, N. Spagnolo, S. Bose, P. Mataloni, R. Osellame, F. Sciarrino, Photonic simulation of entanglement growth and engineering after a spin chain quench, Nature Communications 8, 1569 (2017).

[40] L. Innocenti, H. Majury, T. Giordani, N. Spagnolo, F. Sciarrino, M. Paternostro, A. Ferraro, Quantum state engineering using one-dimensional discrete-time quantum walk, Phys. Rev. A 96, 062326 (2017).

[41] T. Giordani, F. Flamini, M. Pompili, N. Viggianiello, N. Spagnolo, A. Crespi, R. Osellame, N. Wiebe, M. Walschaers, A. Buchleitner, F. Sciarrino, Experimental statistical signature of many-body quantum interference, Natute Photonics 12, 173-178 (2018).

[42] N. Viggianiello, F. Flamini, L. Innocenti, D. Cozzolino, M. Bentivegna, N. Spagnolo, A. Crespi, D. J. Brod, E. F. Galvao, R. Osellame, F. Sciarrino, Experimental generalized quantum suppression law in Sylvester interferometers, New J. Phys. 20, 033017 (2018).

[43] S. Atzeni, A. S. Rab, G. Corrielli, E. Polino, M. Valeri, P. Mataloni, N. Spagnolo, A. Crespi, F. Sciarrino, R. Osellame, Integrated sources of entangled photons at the telecom wavelength in femtosecond-laser-written circuits, Optica 5, 311-314 (2018).

[44] F. Flamini, N. Viggianiello, T. Giordani, M. Bentivegna, N. Spagnolo, A. Crespi, G. Corrielli, R. Osellame, M. A. Martin-Delgado, F. Sciarrino, Observation of photonic states dynamics in 3-D integrated Fourier circuits, Journal of Optics 20, 073002 (2018).

[45] I. Gianani, E. Polino, M. Sbroscia, A. S. Rab, E. Roccia, L. Mancino, N. Spagnolo, M. Barbieri, F. Sciarrino, Hong-Ou-Mandel control through spectral shaping, Journal of Optics 20, 085201 (2018).

Selected as Paper of the Week.

[46] A. Lumino, E. Polino, A. S. Rab, G. Milani, N. Spagnlo, N. Wiebe, F. Sciarrino, Experimental Phase Estimation Enhanced by Machine Learning, Physical Review Applied 10, 044033 (2018).

Selected as Editor Suggestion.

[47] N. Viggianiello, F. Flamini, M. Bentivegna, N. Spagnolo, A. Crespi, D. J. Brod, E. F. Galvao, R. Osellame, F. Sciarrino, Optimal photonic indistinguishability tests in multimode networks, Science Bulletin 63, 1470-1478 (2018).

[48] F. Flamini, N. Spagnolo, F. Sciarrino, Photonic quantum information processing: a review, Reports on Progress in Physics 82, 016001 (2019).

[49] T. Giordani, E. Polino, S. Emiliani, A. Suprano, L. Innocenti, H. Majury, L. Marrucci, M. Paternostro, A. Ferraro, N. Spagnolo, F. Sciarrino, Experimental engineering of arbitrary qudit states with discrete-time quantum walks, Physical Review Letters 122, 020503 (2019).

[50] I. Agresti, N. Viggianiello, F. Flamini, N. Spagnolo, A. Crespi, R. Osellame, N. Wiebe, F Sciarrino, Pattern recognition techniques for Boson Sampling validation, Physical Review X 9, 011013 (2019).

[51] D. J. Brod, E. F. Galvao, N. Viggianiello, F. Flamini, N. Spagnolo, F. Sciarrino, Witnessing Genuine Multiphoton Indistinguishability, Physical Review Letters 122, 063602 (2019).

[52] E. Polino, M. Riva, M. Valeri, R. Silvestri, G. Corrielli, A. Crespi, N. Spagnolo, R. Osellame, F. Sciarrino, Experimental multiphase estimation on a chip, Optica 6, 288-295 (2019).

[53] F. Flamini, N. Spagnolo, F. Sciarrino, Visual assessment of multi-photon interference, Quantum Science and Technology 4, 024008 (2019).

[54] D.J. Brod, E. F. Galvao, A. Crespi, R. Osellame, N. Spagnolo, F. Sciarrino, Photonic implementation of Boson Sampling: a review, Adv. Phot. 1, 034001 (2019)

[55] D. Cozzolino, E. Polino, M. Valeri, G. Carvacho, D. Bacco, N. Spagnolo, L. K. Oxenløwe, F. Sciarrino, Air-core fiber distribution of hybrid vector vortex-polarization entangled states, Adv. Phot. 1, 046005 (2019).

Conference Proceedings

[CP1] F. S. Cataliotti, F. De Martini, F. Sciarrino, N. Spagnolo, and C. Vitelli, Macroscopic quantum entanglement', Proc. SPIE 7092, 7092T (2008).

[CP2] C. Vitelli, N. Spagnolo, F. Sciarrino, and F. De Martini, Non Locality in a Micro-Macroscopic Photon System, AIP Conf. Proc. 1101, 29 (2009).

[CP3] N. Spagnolo, C. Vitelli, F. Sciarrino, and F. De Martini, Entanglement and Decoherence in a Microscopic-Macroscopic system, AIP Conf. Proc. 1110, 211 (2009).

[CP4] C. Vitelli, N. Spagnolo, F. Sciarrino, and F. De Martini, Micro-macro entangled photon systems: results and perspectives, Proc. SPIE 7355, 735508 (2009).

[CP5] N. Spagnolo, C. Vitelli, F. Sciarrino, and F. De Martini, Entanglement test in micro-macroscopic photon system: criteria and assumptions, AIP Conf. Proc. 1327, 221 (2011).

[CP6] N. Spagnolo, C. Vitelli, L. Toffoli, F. De Martini, and F. Sciarrino, Enhanced resolution in lossy phase estimation by optical parametric amplification, Proc. SPIE 8072, 80720M (2011).

[CP7] N. Spagnolo, C. Vitelli, L. Toffoli, F. Sciarrino, F. De Martini, Quantum-to-classical transition via fuzzy measurements on high gain spontaneous parametric down-conversion, AIP Conf. Proc. 1363, 193 (2011).

[CP8] C. Vitelli, N. Spagnolo, L. Toffoli, F. Sciarrino, F. De Martini, Enhanced resolution of lossy interferometry by coherent amplification of single photons, AIP Conf. Proc. 1363, 164 (2011).

[CP9] A. Crespi, R. Ramponi, D. J. Brod, E. F. Galvao, N. Spagnolo, C. Vitelli, L. Sansoni, F. Sciarrino, P. Mataloni, R. Osellame, Arbitrary integrated multimode interferometers for the elaboration of photonic qubits, Proc. SPIE 8972, 89720V (2014).

[CP10] F. Ferreyrol, N. Spagnolo, R. Blandino, M. Barbieri, R. Tualle-Brouri, Heralded processes on continuous-variable spaces as quantum maps, AIP Conf. Proc. 1633, 222 (2014).

[CP11] I. Pitsios, L. Banchi, A. S. Rab, A. Crespi, M. Bentivegna, D. Caprara, N. Spagnolo, P. Mataloni, S. Bose, R. Osellame, F. Sciarrino, Photonic Simulation of Entanglement Generation and Transfer in a Spin Chain, Conference on Lasers and Electro-Optics (2016).

[CP12] A. Crespi, R. Osellame, R. Ramponi, M. Bentivegna, F. Flamini, N. Spagnolo, N. Viggianiello, L. Innocenti, P. Mataloni, F. Sciarrino, Observing Multi-Photon Interference and Suppression Laws in 3D Photonic Chips, Conference on Lasers and Electro-Optics (2016).

[CP13] A. Crespi, R. Osellame, R. Ramponi, M. Bentivegna, F. Flamini, N. Spagnolo, N. Viggianiello, L. Innocenti, P. Mataloni, F. Sciarrino, Observing quantum interference in 3D integrated-photonic symmetric multiports, Proc. SPIE 10106, 101061C (2017).

[CP14] N. Spagnolo, A. Lumino, E. Polino, A. S. Rab, N. Wiebe, F. Sciarrino, Machine Learning for Quantum Metrology, Proceedings 12, 28 (2019).

Other publications

[O1] L. Marrucci, C. Vitelli, N. Spagnolo, F. Sciarrino, Quantum multiplexing in single photons, SPIE Newsroom (2013), DOI: 10.1117/2.1201308.005020.

[O2] L. Sansoni, N. Spagnolo, C. Vitelli, F. Sciarrino, P. Mataloni, Simulating quantum physics by integrated photonic circuits, Il Nuovo Saggiatore Vol.29, No. 5-6, p. 5-16 (2013).

[O3] M. Bentivegna, N. Spagnolo, F. Sciarrino, Is my boson sampler working?, New J. Phys. 18, 041001 (2016).

[O4] N. Spagnolo, F. Sciarrino, The race for quantum supremacy: pushing the classical limit for the photonic hardware, National Science Review, nwy125 (2018), advance online publication.

Preprints

[AR1] F. Flamini, M. Walschaers, N. Spagnolo, N. Wiebe, A. Buchleitner, F. Sciarrino, Requirements for the validation of a quantum advantage in Boson Sampling, [arXiv:1904.12318]

[AR2] V. Cimini, I. Gianani, N. Spagnolo, F. Leccese, F. Sciarrino, M. Barbieri, Calibration of quantum sensors by neural networks, [arXiv:1904.10392]

[AR3] T. Giordani, D. J. Brod, C. Esposito, N. Viggianiello, M. Romano, F. Flamini, G. Carvacho, N. Spagnolo, E. F. Galvao, F. Sciarrino, Experimental quantification of genuine four-photon indistinguishability, [arXiv:1907.01325]

SCIENTIFIC ACHIEVEMENTS

Data Base: ISI Web of Science

Total citations: 1463

h-index: 19

Data Base: Google Scholar

Total citations: 1435

h-index: 25

PATENTS

-) Coauthor of Italian Patent: Tiltmetro fotonico ultra-sensibile utilizzante il momento angolare orbitale della luce, e relative metodo di misura angolare V. D'Ambrosio, N. Spagnolo, L. Del Re, S. Slussarenko, L. Marrucci, Y. Ling, C. Kwek, S. Walborn, L. Aolita, F. Sciarrino (2013) [n.RM2013A000318]

-) Coauthor of European Patent: Tiltmetro fotonico ultra-sensibile utilizzante il momento angolareorbitale della luce, e relative metodo di misura angolare V. D'Ambrosio, N. Spagnolo, L. Del Re, S. Slussarenko, L. Marrucci, Y. Ling, C. Kwek, S. Walborn, L. Aolita, F. Sciarrino (2013) [application no. EP 2811258 A1].

PRESENTATIONS AT CONFERENCES AND MEETINGS

Invited Talks: 8

I1) Conference Quantum 2019, From Foundations of Quantum Mechanics to Quantum Information and Quantum Metrology & Sensing, Turin, Italy, 26 May-1 June 2019.

Invited contribution: ``Validation of multiphoton interference via machine learning"

I2) ESA Workshop Quantum Processing of Big Data: from Quantum computing to Earth observation, Rome, Italy, 3 April 2019.

I3) Workshop on Quantum Technologies in Optronics, Toulouse, France, 12 March 2019.

Invited contribution: ``Integrated photonic platform for quantum multiphase estimation"

I4) Workshop Quantum Photonic Technologies for Space, Bern, Switzerland, 8-10 October 2018.

Invited contribution: ``Integrated quantum photonics for manipulation of photonic quantum states".

I5) 11th Italian Quantum Information Science Conference, Catania, Italy, 17-20 September 2018.

Invited contribution: ``Machine Learning for Quantum Metrology''.

I6) 10th Italian Quantum Information Science Conference, Florence, Italy, 12-15 September 2017.

Invited contribution: ``Validation of Boson Sampling experiments''.

I7) Conference IQIS 2014, Salerno, Italy, 15-19 September 2014.

Invited contribution: Efficient experimental validation of photonic boson sampling .

I8) International Workshop on Singularities and Topological Structures of Light, ICTP, Trieste, Italy, 8-12 July 2013.

Invited contribution:``The Photonics gear: from alignment free quantum communication to super-sensitive quantum correlations''.

Contributed Talks: 16

C1) Conference CLEO Europe/EQEC 2019, Munich, Germany, 23-27 June 2019.

Oral presentation: Experimental multiphase estimation in an integrated multi-arm interferometer .

C2) Conference QTech 2018, Paris, France, 5-7 September 2018.

Oral presentation: Phase estimation enhanced by machine learning

C3) Conference Quantum Simulation and Computation, Bilbao, Spain, 12-16 February 2018.

Oral presentation: Integrated Photonic quantum simulation of spin chain dynamics

C4) Conference CLEO Europe/EQEC 2017, Munich, Germany, 25-29 June 2017.

Oral presentation: Quantum simulation of spin chain dynamics via integrated photonics .

C5) Conference CLEO Europe/EQEC 2015, Munich, Germany, 21-25 June 2015.

Oral presentation: Validation of boson sampling experiments .

C6) Conference CLEO Europe/EQEC 2015, Munich, Germany, 21-25 June 2015.

Oral presentation: Photonic gears for ultra-sensitive angular measurements .

C7) PICQUE Workshop in Integrated Quantum Photonics, Oxford, United Kingdom, 7-9 June 2015.

Oral presentation: Experimental Boson Samping with integrated photonics .

C8) Conference CEWQO 2014, Brussels, Belgium, 23-27 June 2014.

Oral presentation: "Experimental Boson Sampling with integrated photonics".

C9) Workshop on Quantum Simulations, Centro de Ciencas de Benasque, Benasque, Spain, 29 September- 4 October 2013.

Oral presentation: "Experimental Boson Sampling".

C10) Phorbitech 3rd Annual Meeting, Glasgow, UK, 6 June 2013.

Oral presentation: "Joining the quantum state of two photons into one"

C11) CLEO Europe - IQEC 2013, Munich, Germany, 12-16 May 2013.

Oral presentation: "Integrated quantum interferometry with three-dimensional geometry".

C12) Phorbitech 2nd Review Meeting, Napoli, Italy, 23 November 2012.

Oral presentation: "Quantum state merging in photons"

C13) XCVII Congresso Nazionale della Società Italiana di Fisica, L'Aquila, Italy, 26-30 September 2011.

Oral presentation: ``Hybrid techniques for witnessing entanglement in a microscopic-macroscopic system''.

C14) Conference CLEO Europe/EQEC 2011, ICM Centre, Munich, Germany, 22-26 May 2011.

Oral presentation: ``Detecting nonlocality in macroscopic systems''.

C15) Conferenza Fotonica 2011, Palazzo Ducale, Genova, Italy, 9-11 May 2011.

9

Oral presentation: ``Enhanced resolution in lossy phase estimation by optical parametric amplification''.

C16) Spie Optics+Optoelectronics, Prague Congress Center, Prague, Czech Republic, 18-21 April 2011.

Oral presentation: ``Enhanced resolution in lossy phase estimation by optical parametric amplification''.

Poster Presentations: 13

TEACHING

- Assistant to Course: Laboratorio di Meccanica , Prof. Cesare Cametti, A.A. 2011/2012, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma.

- Seminars to Course: Ottica nonlineare e quantistica , Prof. Paolo Mataloni, A.A. 2011/2012, A.A. 2012/2013, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma.

- Seminars to Course: Informazione e Computazione Quantistica , Prof. Fabio Sciarrino, A.A. 2011/2012, A.A. 2012/2013, A.A, 2013/2014, A.A. 2014/2015, I semestre, Corso di Laurea Magistrale in Fisica, Sapienza Università di Roma.

- Assistant to Course: Elettromagnetismo , Prof. Fulvio Ricci, A.A. 2012/2013, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma.

- Assistant to Master Class di Ottica 2013 and 2014 within PLS project, Prof. Fabio Sciarrino

- Assistant to Course: Laboratorio di Meccanica , Prof. Fabio Sciarrino, A.A. 2014/2015, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma.

- Assistant to Course: Laboratorio di Meccanica , Prof. Fabio Sciarrino, A.A. 2015/2016, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma.

- Co-Docente: Ottica e Laboratorio , Prof. Antonio Polimeni and Prof. Fabio Sciarrino, A.A. 2016/2017, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma. Responsible for: 6 CFU

- Co-Docente: Ottica e Laboratorio , Prof. Antonio Polimeni and Prof. Fabio Sciarrino, A.A. 2017/2018, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma. Responsible for: 6 CFU

- Co-Docente: Ottica e Laboratorio , Prof. Antonio Polimeni and Prof. Fabio Sciarrino, A.A. 2018/2019, II semestre, Corso di Laurea Triennale in Fisica, Sapienza Università di Roma. Responsible for: 6 CFU

FUNDING

Project Title: Efficient photon source for telecom wavelength

Supported by: Bando di Ricerca Scientifica Anno 2014

Progetti di avvio alla Ricerca

Tipologia B

Sapienza Università di Roma

Grant: Euro 2500

FFABR 2017 (Fondo di Finanziamento delle Attività di Base di Ricerca)

Supported by: ANVUR

Grant: Euro 3000

SINFONIA Trattamento SIcuro dei dati mediante l INFOrmazione con singoli fotoNI A richiesta

Lazio Innova, Regione Lazio.

Coordinator: Prof. Antonio Polimeni

Grant: 149802,60 Euro

Project Title: Multiphase estimation in multiarm interferometers

Supported by: Bando di Ricerca Scientifica Anno 2018

Progetti Piccoli

Sapienza Università di Roma

Grant: Euro 4000

PARTICIPATION TO OTHER PROJECTS

During the scientific activity as a PhD student and as a Research Fellow, I worked as a part of the Sapienza research unit lead by Prof. Fabio Sciarrino to the following research projects:

- FET-Open Program, within the 7th Framework Programme of the European Commission under Grant no. 255914, PHORBITECH, Coordinator of the Sapienza research unit: Prof. Fabio Sciarrino.

- European Research Council (ERC)-Starting Grant 3D-QUEST, 3D-Quantum Integrated Optical Simulation, grant agreement no. 307783, http://www.3dquest.eu. Principal investigator: Prof. Fabio Sciarrino.

- H2020-FETPROACT-2014 Grant QUCHIP, Quantum Simulation on a Photonic Chip, grant agreement no. 641039, http://www.quchip.eu. Principal Investigator: Prof. Fabio Sciarrino

- ERC Advanced Grant 2015 CAPABLE (Composite integrated photonic platform by femtosecond laser micromachining), Principal Investigator: Prof. Roberto Osellame. PI of Rome Unit: Prof. Fabio Sciarrino.

- ERC Advanced Grant 2015 PHOSPHOR (Photonics of Spin-Orbit Optical Phenomena), Principal Investigator: Prof. Lorenzo Marrucci. PI of Rome Unit: Prof. Fabio Sciarrino.

AWARDS

2013 Poster Award at conference: ICOAM 2013, Glasgow, UK, 3-5 June, 2013

Poster title: Two-photon quantum state joining into one

2013 Poster Award at conference QIPC 2013, Firenze, Italy, 30 June-5 July 2013.

Poster title: Experimental boson sampling

ABILITAZIONE SCIENTIFICA NAZIONALE

Abilitazione Scientifica Nazionale (ASN) come professore di II fascia.

From 30/03/2018 to 30/03/2024

REFEREE ACTIVITY

- Referee for several journals:

Nature Photonics, Nature Physics, Nature Communications, Optica, Physical Review Letters, Physical Review A, Quantum Science and Technology, Scientific Reports, Entropy.

- Guest Editor of Special Issue Quantum Information processing on International Journal Entropy (MDPI, IF: 2.305): https://www.mdpi.com/journal/entropy/special_issues/QIP

SUMMARY OF RESEARCH ACTIVITY

1) PhD research activity

My research activity during the PhD focused on the generation, manipulation, and characterization of quantum states of the electromagnetic field, for their applications in fundamental tests of quantum mechanics and in quantum information protocols. The generation of multiphoton states through the process of optical parametric amplification has been investigated in the several contexts.

- The possibility of observing quantum properties for increasing size of the system, that is, by increasing the number of involved photons, has been analyzed. I carried out an analysis on the resilience to losses of the multiphoton states generated by optical parametric amplification, showing that these states present some robustness with respect to noise.

- A detailed analysis of a specific system has been carried out. This system is obtained starting from an entangled pair: one of the two photon undergoes an amplification process and its properties are transferred to a multiphoton state. Such system has been adopted as a possible benchmark to investigate the quantum-to-classical transition. Within this platform, I contributed in investigating theoretically the possibility of observing quantum entanglement for increasing number of photons, by exploiting both discrete and continuous variables detection techniques.

- During the training period at the Institut d'Optique in Palaiseau in the group of Prof. Grangier, one of the world leading group in the field, I had the opportunity to acquire experimental skills on the homodyne detection technique.

- Starting from the initial results on the robustness to losses of the multiphoton states generated by optical parametric amplification, the experimental application of such process within the context of optical sensing has been experimentally investigated. In particular, a protocol to exploit the ampification process to protect the information written in a probe state for the measurement of an optical phase has been devised. My contribution on this protocol was both on the experimental side, by participating in the development of the platform, and on the theoretical side, by analyzing and verifying the optimality of the protocol.

2) Post-doctoral research activity

During the Research Fellowship and RTD-A periods in Sapienza Università di Roma, my research activity focused on the experimental implementation of quantum information and quantum simulations protocols with different photonic platforms.

In a first part of my activity, attention has been devoted to hybrid optical systems, aimed at exploiting different degrees of freedom of the light. Some of the main results have been:

- The experimental implementation of a novel quantum information protocol to transfer two qubits of information from 2 photons into 2 degrees of freedom of a single photon has been performed. I contributed in developing a feasible experimental interferometric scheme for the protocol, with the requirement of being self-stabilized to avoid the need of any active phase-stabilization system. A News and Views article on Nature Photonics has been dedicated to these results: J. S. Neergaard-Nielsen, Nature Photonics 7, 512 513 (2013).

- A protocol to increase the sensitivity in the measurement of a roll angle has been experimentally implemented. This method exploits the adoption of hybrid states encoded in both the polarization and the orbital angular momentum of the light. In particular, I analyzed the performances achieved by this protocol in the general context of quantum phase estimation.

Recently the implementation of multiphoton experiments in integrated optical circuits has been addressed. Some of the main results include:

- The observation of three-photon interference has been reported in an integrated three-port splitter realized by the femtosecond laser-writing technique. This was the first reported implementation of a three-photon bosonic coalescence experiment. I contributed in performing the quantum three-photon measurements.

- The application of the integrated multiport splitters in the context of phase estimation has been theoretically analyzed, both for single-parameter estimation and the novel field of quantum multiparameter estimation.

- The implementation of the boson samping problem has been addressed. This computational problem is defined as sampling the output distribution of a system of boson evolving under a unitary transformation. This protocol represents a promising candidate of a dedicated system build to reach a regime where a quantum device solves the problem faster than its classical counterpart. I contributed in performing the quantum three-photon measurements in a 5-mode integrated interformeter. These results received a News and Views article:T. C. Ralph, Nature Photonics 7, 514 515 (2013).

- The validation of a Boson Sampling device, due to its computational complexity, is a non-trivial problem. First tests on its validation have been experimentally performed up to three photon in integrated interferometer with up to 13 modes. I contributed in performing the quantum measurements and in developing a validation test against the hypothesis of distinguishable photons.

- Recently, an extension of the boson sampling problem named Scattershot Boson Sampling has been theoretically proposed, and it has been shown to provide in principle an exponential enhancement with respect to the conventional problem. During my activity as a research fellow I contributed to the first experimental implementation of this protocol within an integrated photonics platform.

More recents results include:

- the experimental observation of a suppression law in integrated Fourier and Sylvester interferometers,

- the photonic simulation on an integrated platform of entanglement growth in a spin chain quench.

- the first implementation of a reconfigurable integrated circuit in the telecom domain have been reported. This work received a research highlight on Nature Photonics: N. Horiuchi, Nature Photonics 10, 73 (2016).

- realization and characterization of a modular integrated source of entangled photon pairs in polarization or path degrees of freedom

- further analysis on validation techniques for Boson Samping experiments

- analysis on the characterization and optimal architectures for integrated photonic interferometers

- theoretical analysis on optimal measurements for multiparameter estimation, paper selected as Editors suggestion in Physical Review Letters.

- experimental implementation of a novel protocol to generated entangled photon pairs in their dual wave-particle nature.

- single-photon and multiparameter estimation experiments

- application of machine learning for quantum experiments, including device certification, quantum state engineering, and adaptive control of quantum systems for quantum metrology.

Course | Code | Year | Course - Attendance |
---|---|---|---|

Physics | 97597 | 2020/2021 | Natural Sciences |

Physics | 97597 | 2019/2020 | Natural Sciences |

OPTICS AND LABORATORY | 1018976 | 2018/2019 | Physics |

OPTICS AND LABORATORY | 1018976 | 2017/2018 | Physics |

OPTICS AND LABORATORY | 1018976 | 2016/2017 | Physics |

Department

FISICA

SSD

FIS/03