Imaging entanglement correlations with a single-photon avalanche diode
camera
- URL: http://arxiv.org/abs/2001.03997v4
- Date: Wed, 12 Aug 2020 09:50:06 GMT
- Title: Imaging entanglement correlations with a single-photon avalanche diode
camera
- Authors: Bienvenu Ndagano, Hugo Defienne, Ashley Lyons, Ilya Starshynov,
Federica Villa, Simone Tisa, and Daniele Faccio
- Abstract summary: We employ a high frame rate, single photon avalanche diode (SPAD) camera to measure the spatial joint probability distribution of a bi-photon state.
We verified the presence of spatial entanglement between our photon pairs through the violation of an Einstein-Podolsky-Rosen criterion.
- Score: 0.9322743017642272
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: 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 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 $10^7$ frames acquired
in just 140 seconds. We verified the presence of spatial entanglement between
our photon pairs through the violation of an Einstein-Podolsky-Rosen criterion,
with a confidence level of 227 sigmas. Our work demonstrates the potential of
SPAD cameras in the rapid characterisation of photon correlations, leading the
way towards quantum imaging in real-time.
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