Decoherence of photon-subtracted squeezed vacuum state in dissipative channel |
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| Authors: | Xu Xue-Xiang Yuan Hong-Chun Fan Hong-Yi |
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| Affiliation: | College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China; Department of Physics, Shanghai Jiao Tong University, Shanghai 200030, China |
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| Abstract: | This paper investigates the decoherence of photo-subtracted squeezed vacuum state (PSSVS) in dissipative channel by describing its statistical properties with time evolution such as Wigner function, Husimi function, and tomogram. It first calculates the normalization factor of PSSVS related to Legendre polynomial. After deriving the normally ordered density operator of PSSVS in dissipative channel, one obtains the explicit analytical expressions of time evolution of PSSVS's statistical distribution function. It finds that these statistical distributions loss their non-Gaussian nature and become Gaussian at last in the dissipative environment as expected. |
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| Keywords: | photon-subtracted squeezed vacuum state Wigner function Husimi function tomogram |
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