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Frontiers in Optics

Preserving twin-beams spatial correlations with Skipper-CCD detection

Agustina G. Magnoni, Muriel Bonetto, Juan Estrada, Javier Tiffenberg, M. A. Larotonda, Darío Rodrigues

Published Jan 1, 2022• 0 citations
Publisher

Abstract

In this work, we study the potential of using a Skipper-CCD detector in a twin-beam source for preserving spatial correlations. An improvement in the noise reduction factor is predicted and preliminary experimental results are presented.
DOI
10.1364/fio.2022.jtu4a.33

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Photons in twin beams exhibit correlations in both photon number and spatial detection position. Here spatial correlations in detection positions are exploited to develop a method for reconstructing the joint photon-number distribution of a twin beam from the experimental photocount histograms. This considerably reduces experimental noise, making it superior to the usual methods. This practical reconstruction method for spatially resolved photon counting is suitable for any application that requires joint photon-number distributions of twin beams, in e.g.e.g.e.g. metrology, or future quantum communication protocols.
Sometimes you need a steady drip, not a torrent---as in certain optics experiments, where the precise number of photons in each ``drip'' of a faint beam is important. The authors use an intensified charge-coupled device as a photon-number-resolving detector with spatial resolution, to study at once the joint photocount distributions and spatial correlations of weak twin beams of light. Compared to the usual analysis of photocount distributions, their spatially resolved analysis provides additional information about the statistical properties of the beams, and allows noise reduction.