Quantum image distillation

Defienne, Hugo; Reichert, Matthew; Fleischer, Jason W.; Faccio, Daniele

doi:10.1126/sciadv.aax0307

Cited by 65 publications

(68 citation statements)

References 28 publications

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“…Quantum entanglement is an essential source of quantum optics for many applications, such as quantum cryptography (5,6), teleportation (7)(8)(9), superresolving metrology (10), and quantum imaging (11). In particular, in the field of quantum imaging, spatial intensity correlations between photon pairs can be exploited to surpass the classical limits of imaging (12)(13)(14). Besides, the introduction of quantum image processing techniques illuminated with heralded single photons reveals the superior antinoise capacity for photon-limited imaging (15).…”

Section: Introductionmentioning

confidence: 99%

Metasurface enabled quantum edge detection

et al. 2020

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Metasurfaces consisting of engineered dielectric or metallic structures provide unique solutions to realize exotic phenomena including negative refraction, achromatic focusing, electromagnetic cloaking, and so on. The intersection of metasurface and quantum optics may lead to new opportunities but is much less explored. Here, we propose and experimentally demonstrate that a polarization-entangled photon source can be used to switch ON or OFF the optical edge detection mode in an imaging system based on a high-efficiency dielectric metasurface. This experiment enriches both fields of metasurface and quantum optics, representing a promising direction toward quantum edge detection and image processing with remarkable signal-to-noise ratio.

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Section: Introductionmentioning

confidence: 99%

Metasurface enabled quantum edge detection

et al. 2020

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“…We have used a SPAD camera to characterise and quantify highdimensional entanglement between photon pairs. By measuring position and momentum correlations using 10 7 intensity images, we showed a violation of an EPR criterion by 227 sigmas for an acquisition time of 140 s. While EPR violation has been demonstrated by acquiring very few frames with a highly sensitive EMCCD camera 46 , quantum imaging approaches based on correlation measurements between spatially entangled photon pairs require the measurement of a large number of frames 26,28,29,31,47,48 , typically on the order of 10 6 -10 7 . This is to ensure high enough SNR on the conditional projections to reconstruct the image by exploiting photon-pair correlations.…”

Section: Discussionmentioning

confidence: 93%

“…The governing law for this process is momentum conservation that ensures correlations between the photons in the pair 19,20 . These correlations can be exploited for ghost imaging [21][22][23] , imaging Bell-type non-local behaviour 24 , imaging at enhanced spatial resolution 25,26 , quantum-enhanced target detection 27 and to distil an image encoded in quantum states in the presence of classical background radiation 28,29 . We note that recently, Ianzano et al 30 have demonstrated the measurement of polarisation entanglement using a camera, owing to its high-temporal resolution (1.5 ns).…”

Section: Introductionmentioning

confidence: 99%

Imaging and certifying high-dimensional entanglement with a single-photon avalanche diode camera

et al. 2020

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Spatial correlations between two photons are the key resource in realising many quantum imaging schemes. Measurement of the bi-photon correlation map is typically performed using single-point scanning detectors or single-photon cameras based on charged coupled device (CCD) technology. However, both approaches are limited in speed due to the slow scanning and the low frame rate of CCD-based cameras, resulting in data acquisition times on the order of many hours. Here, we employ a high frame rate, single-photon avalanche diode (SPAD) camera, to measure the spatial joint probability distribution of a bi-photon state produced by spontaneous parametric down-conversion, with statistics taken over 107 frames. Through violation of an Einstein–Podolsky–Rosen criterion by 227 sigmas, we confirm the presence of spatial entanglement between our photon pairs. Furthermore, we certify, in just 140 s, an entanglement dimensionality of 48. Our work demonstrates the potential of SPAD cameras in the rapid characterisation of photonic entanglement, leading the way towards real-time quantum imaging and quantum information processing.

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“…An EM-CCD not operated in single-photon regime can be used for intensity correlation measurements aimed at the distillation of a quantum image starting from measured data composed by the superposition of both quantum and classical light. [40] A high quantum efficiency CCD camera is reported in a quantum illumination experiment, where the probe beam of a correlated pair may be partially reflected by the target object toward the camera, which also receives a high unknown thermal background noise. [41] That implementation involved only photoncounting measurements of the second-order correlation between the probe and the reference beams, and the quantum superiority was demonstrated against the classical protocol.…”

Section: Detectors For Photon Coincidence Detectionmentioning

confidence: 99%

Single Photon Avalanche Diode Arrays for Quantum Imaging and Microscopy

et al. 2021

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Quantum imaging and microscopy profit from quantum correlations and entanglement to image objects and samples with resolution and sensitivity that goes far beyond what can be achieved through classical optics. In order to carry out these techniques, suitable detectors with specific features must be employed. This paper aims to highlight the importance of sensors based on single photon avalanche diodes (SPAD) in quantum imaging and microscopy applications, paving the way for the next-generation ideal quantum imager. After reviewing the main techniques (based on quantum physics principles) for improving the resolution and sensitivity of a sample image, the pros and cons of different sensors, such as avalanche photodiodes (APDs), and the intensified and electron-multiplying charge coupled devices (ICCDs and EMCCDs), are identified. Then the analysis mainly focuses on SPAD-based detectors, identified as the best candidates for quantum imaging, critically discussing the requirements and performance, also in relation to already existing SPAD-based architectures with specific features fitting the application. Eventually, next-generation quantum imagers should integrate together all the best architectural choices herewith presented, so as to detect photon coincidences and to perform efficient event-driven readout, also by exploiting a suitable technology and SPAD design to optimize the discussed detection performance.

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Quantum image distillation

Abstract: Images composed of both quantum and classical light can be distilled so as to separate the quantum from the classical information.

Cited by 65 publications

References 28 publications

Metasurface enabled quantum edge detection

Metasurface enabled quantum edge detection

Imaging and certifying high-dimensional entanglement with a single-photon avalanche diode camera

Single Photon Avalanche Diode Arrays for Quantum Imaging and Microscopy

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