Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Frontiers in Optics

Optimizing Coincidence Measurements of Entangled Photons

Matthew C. Reichert, Hugo Defienne, Jason W. Fleischer

Published Jan 1, 2017• 0 citations
Publisher

Abstract

We present the general SNR of coincidence measurements of joint probability of entangled-photon-pairs. Experiments with an EMCCD camera show excellent agreement for count rates up to saturation, and an optimum based on electronic noise.
DOI
10.1364/fio.2017.jw4a.31

Related papers

Imaging the Joint Probability Distribution of Spatially Entangled Photon Pairs with a Camera

Matthew C. Reichert, Hugo Defienne, Jason W. Fleischer

We present massively parallel coincidence counting of entangled photon pairs by measuring coincidences between all pairs of pixels in a single-photon-sensitive camera, including the case where both entangled photons arrive in the same pixel.

Imaging and Applied Optics•Jan 1, 2018•0 citations

Joint Characterization of Two Single Photon Detectors with a Fiber-based Source of Entangled Photon Pairs

Daniel E. Jones, Brian T. Kirby, Michael Brodsky

By simultaneously measuring individual and coincidence counts of two single photon detectors connected to an entangled photon pair source, we extract the detector efficiencies, the average number of generated pairs, and the Raman noise floor.

Frontiers in Optics•Jan 1, 2017•6 citations

Measuring correlated photon pairs with an EMCCD camera

Jonathan Leach, Sangeeta Murugkar, M. Edgar +4 more

The multiple pixels and high quantum efficiency of EMCCD cameras make them an attractive technology for quantum optics. We use such a camera to measure correlations present in the two-photon field generated by parametric down-conversion.

International Conference on Quantum Information•Jan 1, 2011•0 citations

Improved Phase Retrieval in Quantum Imaging by Filtering of Spatial Entanglement

Chien-Hung Lu, Jason W. Fleischer

We adjust the geometry of quantum illumination so that detection in an EMCCD camera corresponds to coincident counting of entangled photon pairs. With appropriate filtering, improved quantum phase imaging is demonstrated.

Imaging and Applied Optics•Jan 1, 2015•0 citations

Quantum Imaging of Non-Unitary Objects with Spatially Entangled Photon Pairs

Matthew C. Reichert, Hugo Defienne, Xiaohang Sun +1 more

We image one- and two-photon parts of the state of entangled photon pairs transmitted through lossy objects using an EMCCD camera and demonstrate that the one-photon intensity contains information on the degree of spatial entanglement.

Imaging and Applied Optics•Jan 1, 2017•0 citations

Optimizing the signal-to-noise ratio of biphoton distribution measurements

Matthew C. Reichert, Hugo Defienne, Jason W. Fleischer

Single-photon-sensitive cameras can now be used as massively parallel coincidence counters for entangled photon pairs. This enables measurement of biphoton joint probability distributions with orders-of-magnitude greater dimensionality and faster acquisition speeds than traditional raster scanning of point detectors; to date, however, there has been no general formula available to optimize data collection. Here we analyze the dependence of such measurements on count rate, detector noise properties, and threshold levels. We derive expressions for the biphoton joint probability distribution and its signal-to-noise ratio (SNR), valid beyond the low-count regime up to detector saturation. The analysis gives operating parameters for global optimum SNR that may be specified prior to measurement. We find excellent agreement with experimental measurements within the range of validity and discuss discrepancies with the theoretical model for high thresholds. This work enables optimized measurement of the biphoton joint probability distribution in high-dimensional joint Hilbert spaces.

arXiv:1802.00489•Physical Review A•Jul 26, 2018•20 citations
Single-photon-sensitive cameras can now be used as massively parallel coincidence counters for entangled photon pairs. This enables measurement of biphoton joint probability distributions with orders-of-magnitude greater dimensionality and faster acquisition speeds than traditional raster scanning of point detectors; to date, however, there has been no general formula available to optimize data collection. Here we analyze the dependence of such measurements on count rate, detector noise properties, and threshold levels. We derive expressions for the biphoton joint probability distribution and its signal-to-noise ratio (SNR), valid beyond the low-count regime up to detector saturation. The analysis gives operating parameters for global optimum SNR that may be specified prior to measurement. We find excellent agreement with experimental measurements within the range of validity and discuss discrepancies with the theoretical model for high thresholds. This work enables optimized measurement of the biphoton joint probability distribution in high-dimensional joint Hilbert spaces.