Photostatistics Reconstruction via Loop Detector Signatures

Details Photostatistics Reconstruction via Loop Detector Signatures Photostatistics Reconstruction via Loop Detector Signatures

2009-07-20

arxiv.org/abs/0907.3345v1

J. G. Webb and E. H. Huntington, "Photostatistics reconstruction via loop detector signatures," Opt. Express 17, 11799-11812 (

Physics

Quantum Physics

13 pages, 12 figures

Scientific paper

10.1364/OE.17.011799

Photon-number resolving detectors are a fundamental building-block of optical quantum information processing protocols. A loop detector, combined with appropriate statistical processing, can be used to convert a binary on/off photon counter into a photon-number-resolving detector. Here we describe the idea of a signature of photon-counts, which may be used to more robustly reconstruct the photon number distribution of a quantum state. The methodology is applied experimentally in a 9-port loop detector operating at a telecommunications wavelength and compared directly to the approach whereby only the number of photon-counts is used to reconstruct the input distribution. The signature approach is shown to be more robust against calibration errors, exhibit reduced statistical uncertainty, and reduced reliance on a-priori assumptions about the input state.

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