New protocols of quantum imaging at INRIM Carmine Napoli, Alberto Paniate, Ivano Ruo Berchera, Marco Genovese Proceedings of SPIE the International Society for Optical Engineering, 2024
Non-Interferometric Quantitative Phase Imaging Enhanced by Quantum Correlations Alberto Paniate, Giuseppe Ortolano, Pauline Boucher, Carmine Napoli, Sarika Soman, et al. Quantum 2 0 in Proceedings Quantum 2 0 Conference and Exhibition, 2024 We exploit quantum correlations to enhance quantitative phase retrieval of an object in a non-interferometric setting, only measuring the propagated intensity pattern after interaction with the object
Quantum Enhanced Non-Interferometric Quantitative Phase Imaging Alberto Paniate, Giuseppe Ortolano, Pauline Boucher, Carmine Napoli, Sarika Soman, et al. CLEO Fundamental Science CLEO Fs 2024 in Proceedings CLEO 2024 Part of Conference on Lasers and Electro Optics, 2024 We propose a technique which exploits entanglement to enhance quantitative phase retrieval of an object in a non-interferometric setting only measuring the propagated intensity pattern after interaction with the object
Quantum Enhanced Non-Interferometric Quantitative Phase Imaging Alberto Paniate, Giuseppe Ortolano, Pauline Boucher, Carmine Napoli, Sarika Soman, et al. 2024 Conference on Lasers and Electro Optics CLEO 2024, 2024 We propose a technique which exploits entanglement to enhance quantitative phase retrieval of an object in a non-interferometric setting only measuring the propagated intensity pattern after interaction with the object
Quantum enhanced non-interferometric quantitative phase imaging Giuseppe Ortolano, Alberto Paniate, Pauline Boucher, Carmine Napoli, Sarika Soman, et al. Light Science and Applications, 2023 Quantum entanglement and squeezing have significantly improved phase estimation and imaging in interferometric settings beyond the classical limits. However, for a wide class of non-interferometric phase imaging/retrieval methods vastly used in the classical domain, e.g., ptychography and diffractive imaging, a demonstration of quantum advantage is still missing. Here, we fill this gap by exploiting entanglement to enhance imaging of a pure phase object in a non-interferometric setting, only measuring the phase effect on the free-propagating field. This method, based on the so-called “transport of intensity equation", is quantitative since it provides the absolute value of the phase without prior knowledge of the object and operates in wide-field mode, so it does not need time-consuming raster scanning. Moreover, it does not require spatial and temporal coherence of the incident light. Besides a general improvement of the image quality at a fixed number of photons irradiated through the object, resulting in better discrimination of small details, we demonstrate a clear reduction of the uncertainty in the quantitative phase estimation. Although we provide an experimental demonstration of a specific scheme in the visible spectrum, this research also paves the way for applications at different wavelengths, e.g., X-ray imaging, where reducing the photon dose is of utmost importance.
Quantum-Enhanced Pattern Recognition Giuseppe Ortolano, Carmine Napoli, Cillian Harney, Stefano Pirandola, Giuseppe Leonetti, et al. Physical Review Applied, 2023 The challenge of pattern recognition is to invoke a strategy that can accurately extract features of a dataset and classify its samples. In realistic scenarios this dataset may be a physical system from which we want to retrieve information, such as in the readout of optical classical memories. The theoretical and experimental development of quantum reading has demonstrated that the readout of optical memories can be dramatically enhanced through the use of quantum resources (namely entangled input-states) over that of the best classical strategies. However, the practicality of this quantum advantage hinges upon the scalability of quantum reading, and up to now its experimental demonstration has been limited to individual cells. In this work, we demonstrate for the first time quantum advantage in the multi-cell problem of pattern recognition. Through experimental realizations of digits from the MNIST handwritten digit dataset, and the application of advanced classical post-processing, we report the use of entangled probe states and photon-counting to achieve quantum advantage in classification error over that achieved with classical resources, confirming that the advantage gained through quantum sensors can be sustained throughout pattern recognition and complex post-processing. This motivates future developments of quantum-enhanced pattern recognition of bosonic-loss within complex domains.
Towards superresolution surface metrology: Quantum estimation of angular and axial separations Carmine Napoli, Samanta Piano, Richard Leach, Gerardo Adesso, Tommaso Tufarelli Physical Review Letters, 2019 We investigate the localization of two incoherent point sources with arbitrary angular and axial separations in the paraxial approximation. By using quantum metrology techniques, we show that a simultaneous estimation of the two separations is achievable by a single quantum measurement, with a precision saturating the ultimate limit stemming from the quantum Cramér-Rao bound. Such a precision is not degraded in the subwavelength regime, thus overcoming the traditional limitations of classical direct imaging derived from Rayleigh's criterion. Our results are qualitatively independent of the point spread function of the imaging system, and quantitatively illustrated in detail for the Gaussian instance. This analysis may have relevant applications in three-dimensional surface measurements.
Robustness of coherence: An operational and observable measure of quantum coherence Carmine Napoli, Thomas R. Bromley, Marco Cianciaruso, Marco Piani, Nathaniel Johnston, et al. Physical Review Letters, 2016 Quantifying coherence is an essential endeavor for both quantum foundations and quantum technologies. Here, the robustness of coherence is defined and proven to be a full monotone in the context of the recently introduced resource theories of quantum coherence. The measure is shown to be observable, as it can be recast as the expectation value of a coherence witness operator for any quantum state. The robustness of coherence is evaluated analytically on relevant classes of states, and an efficient semidefinite program that computes it on general states is given. An operational interpretation is finally provided: the robustness of coherence quantifies the advantage enabled by a quantum state in a phase discrimination task.
Robustness of asymmetry and coherence of quantum states Marco Piani, Marco Cianciaruso, Thomas R. Bromley, Carmine Napoli, Nathaniel Johnston, et al. Physical Review A, 2016 Quantum states may exhibit asymmetry with respect to the action of a given group. Such an asymmetry of states can be considered as a resource in applications such as quantum metrology, and it is a concept that encompasses quantum coherence as a special case. We introduce explicitly and study the robustness of asymmetry, a quantifier of asymmetry of states that we prove to have many attractive properties, including efficient numerical computability via semidefinite programming, and an operational interpretation in a channel discrimination context. We also introduce the notion of asymmetry witnesses, whose measurement in a laboratory detects the presence of asymmetry. We prove that properly constrained asymmetry witnesses provide lower bounds to the robustness of asymmetry, which is shown to be a directly measurable quantity itself. We then focus our attention on coherence witnesses and the robustness of coherence, for which we prove a number of additional results; these include an analysis of its specific relevance in phase discrimination and quantum metrology, an analytical calculation of its value for a relevant class of quantum states, and tight bounds that relate it to another previously defined coherence monotone.
RECENT SCHOLAR PUBLICATIONS
Table-top nanodiamond interferometer: from ultraprecise sensing to quantum gravity tests IP Degiovanni, F Piacentini, M Vicentini, E Bernardi, E Moreva, C Napoli, ... Quantum Sensing, Imaging, and Precision Metrology IV, PC139202Z , 2026 2026
The Bose-Marletto-Vedral experiment with nanodiamond interferometers: an insight on entanglement detection G Di Pietra, F Piacentini, E Bernardi, E Moreva, C Napoli, IP Degiovanni, ... arXiv preprint arXiv:2410.19601 , 2024 2024 Citations: 1
New protocols of quantum imaging at INRIM C Napoli, A Paniate, IR Berchera, M Genovese Quantum Communications and Quantum Imaging XXII 13148, 1314802 , 2024 2024
Non-Interferometric Quantitative Phase Imaging Enhanced by Quantum Correlations A Paniate, G Ortolano, P Boucher, C Napoli, S Soman, SF Pereira, ... Quantum 2.0, QTu4C. 5 , 2024 2024
Table-top nanodiamond interferometer enabling quantum gravity tests M Vicentini, E Bernardi, M Bordin, E Moreva, F Piacentini, C Napoli, ... arXiv preprint arXiv:2405.21029 , 2024 2024 Citations: 2
Quantum Enhanced Non-Interferometric Quantitative Phase Imaging A Paniate, G Ortolano, P Boucher, C Napoli, S Soman, SF Pereira, ... 2024 Conference on Lasers and Electro-Optics (CLEO), 1-2 , 2024 2024
Quantum hypothesis testing applications: from quantum reading to pattern recognition M Genovese, G Ortolano, IR Berchera, S Pirandola, C Napoli, C Harney Quantum Communications and Quantum Imaging XXI, PC1269203 , 2023 2023
Quantum-enhanced pattern recognition G Ortolano, C Napoli, C Harney, S Pirandola, G Leonetti, P Boucher, ... Physical Review Applied 20 (2), 024072 , 2023 2023 Citations: 34
Quantum enhanced non-interferometric quantitative phase imaging G Ortolano, A Paniate, P Boucher, C Napoli, S Soman, SF Pereira, ... Light: Science & Applications 12 (1), 171 , 2023 2023 Citations: 57
Quantum-enhanced strategies for surface and phase discrimination C Napoli University of Nottingham , 2021 2021
Towards superresolution surface metrology: quantum estimation of angular and axial separations C Napoli, S Piano, R Leach, G Adesso, T Tufarelli Physical review letters 122 (14), 140505 , 2019 2019 Citations: 105
Robustness of coherence: an operational and observable measure of quantum coherence C Napoli, TR Bromley, M Cianciaruso, M Piani, N Johnston, G Adesso Physical review letters 116 (15), 150502 , 2016 2016 Citations: 700
Robustness of asymmetry and coherence of quantum states M Piani, M Cianciaruso, TR Bromley, C Napoli, N Johnston, G Adesso Physical Review A 93 (4), 042107 , 2016 2016 Citations: 342
MOST CITED SCHOLAR PUBLICATIONS
Robustness of coherence: an operational and observable measure of quantum coherence C Napoli, TR Bromley, M Cianciaruso, M Piani, N Johnston, G Adesso Physical review letters 116 (15), 150502 , 2016 2016 Citations: 700
Robustness of asymmetry and coherence of quantum states M Piani, M Cianciaruso, TR Bromley, C Napoli, N Johnston, G Adesso Physical Review A 93 (4), 042107 , 2016 2016 Citations: 342
Towards superresolution surface metrology: quantum estimation of angular and axial separations C Napoli, S Piano, R Leach, G Adesso, T Tufarelli Physical review letters 122 (14), 140505 , 2019 2019 Citations: 105
Quantum enhanced non-interferometric quantitative phase imaging G Ortolano, A Paniate, P Boucher, C Napoli, S Soman, SF Pereira, ... Light: Science & Applications 12 (1), 171 , 2023 2023 Citations: 57
Quantum-enhanced pattern recognition G Ortolano, C Napoli, C Harney, S Pirandola, G Leonetti, P Boucher, ... Physical Review Applied 20 (2), 024072 , 2023 2023 Citations: 34
Table-top nanodiamond interferometer enabling quantum gravity tests M Vicentini, E Bernardi, M Bordin, E Moreva, F Piacentini, C Napoli, ... arXiv preprint arXiv:2405.21029 , 2024 2024 Citations: 2
The Bose-Marletto-Vedral experiment with nanodiamond interferometers: an insight on entanglement detection G Di Pietra, F Piacentini, E Bernardi, E Moreva, C Napoli, IP Degiovanni, ... arXiv preprint arXiv:2410.19601 , 2024 2024 Citations: 1
Table-top nanodiamond interferometer: from ultraprecise sensing to quantum gravity tests IP Degiovanni, F Piacentini, M Vicentini, E Bernardi, E Moreva, C Napoli, ... Quantum Sensing, Imaging, and Precision Metrology IV, PC139202Z , 2026 2026
New protocols of quantum imaging at INRIM C Napoli, A Paniate, IR Berchera, M Genovese Quantum Communications and Quantum Imaging XXII 13148, 1314802 , 2024 2024
Non-Interferometric Quantitative Phase Imaging Enhanced by Quantum Correlations A Paniate, G Ortolano, P Boucher, C Napoli, S Soman, SF Pereira, ... Quantum 2.0, QTu4C. 5 , 2024 2024
Quantum Enhanced Non-Interferometric Quantitative Phase Imaging A Paniate, G Ortolano, P Boucher, C Napoli, S Soman, SF Pereira, ... 2024 Conference on Lasers and Electro-Optics (CLEO), 1-2 , 2024 2024
Quantum hypothesis testing applications: from quantum reading to pattern recognition M Genovese, G Ortolano, IR Berchera, S Pirandola, C Napoli, C Harney Quantum Communications and Quantum Imaging XXI, PC1269203 , 2023 2023
Quantum-enhanced strategies for surface and phase discrimination C Napoli University of Nottingham , 2021 2021
