Non-Gaussianity of quantum states: an experimental test on single-photon added coherent states

Details Non-Gaussianity of quantum states: an experimental test on single-photon added coherent states Non-Gaussianity of quantum states: an experimental test on single-photon added coherent states

2010-12-02

arxiv.org/abs/1012.0466v1

Physical Review A 82, 063833 (2010)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.82.063833

Non Gaussian states and processes are useful resources in quantum information with continuous variables. An experimentally accessible criterion has been proposed to measure the degree of non Gaussianity of quantum states, based on the conditional entropy of the state with a Gaussian reference. Here we adopt such criterion to characterise an important class of non classical states, single-photon added coherent states. Our studies demonstrate the reliability and sensitivity of this measure, and use it to quantify how detrimental is the role of experimental imperfections in our realisation.

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