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28 March 2024
 
  » arxiv » 1302.0229

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Direct observation of sub-binomial light
Tim J. Bartley ; Gaia Donati ; Xian-Min Jin ; Animesh Datta ; Marco Barbieri ; Ian A. Walmsley ;
Date 1 Feb 2013
AbstractNonclassical states of light are necessary resources for quantum technologies such as cryptography, computation and the definition of metrological standards. Observing signatures of nonclassicality generally requires inferring either the photon number distribution or a quasi-probability distribution indirectly from a set of measurements. Here, we report an experiment in which the nonclassical character of families of quantum states is assessed by direct inspection of the outcomes from a multiplexed photon counter. This scheme does not register the actual photon number distribution; the statistics of the detector clicks alone serve as a witness of nonclassicality, as proposed by Sperling et al. in Phys. Rev. Lett. 109, 093601 (2012). Our work paves a way for the practical characterisation of increasingly sophisticated states and detectors.
Source arXiv, 1302.0229
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