Photon-added squeezed thermal states: Statistical properties and its decoherence in a photon-loss channel |
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Authors: | Xue-xiang Xu Li-yun Hu Hong-yi Fan |
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Institution: | a Department of Physics, Shanghai Jiao Tong University, Shanghai 200030, China b College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China |
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Abstract: | In this paper, we introduce the photon-added squeezed thermal state (PASTS), the excitation of displaced-squeezed chaotic field, and investigate its statistical properties, such as Mandel’s Q-parameter, number distribution (as a Legendre polynomial), the Wigner function (WF). The way we study it is using the normally ordered Gaussian form of displaced-squeezed thermal field characteristic of average photon-number . Then we study its decoherence in a photon-loss channel in term of the negativity of WF by deriving the analytical expression of WF for PASTS. It is found that the WF with single photon-added is always partial negative for the arbitrary values of and the squeezing parameter r. |
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