Decoherence of photon-subtracted squeezed vacuum state in dissipative channel

doi:10.1088/1674-1056/20/2/024203

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.

Keywords: photon-subtracted squeezed vacuum state Wigner function Husimi function tomogram

Received: 07 March 2010
Revised: 09 July 2010
Accepted manuscript online:

PACS:	42.50.-p	(Quantum optics)
	03.65.-w	(Quantum mechanics)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10775097), the Key Program Foundation of the Ministry of Education of China (Grant No. 210115) and the Research Foundation of the Education Department of Jiangxi Province of China (Grant No. GJJ10097).

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Xu Xue-Xiang(徐学翔), Yuan Hong-Chun(袁洪春), and Fan Hong-Yi(范洪义) Decoherence of photon-subtracted squeezed vacuum state in dissipative channel 2011 Chin. Phys. B 20 024203

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Decoherence of photon-subtracted squeezed vacuum state in dissipative channel

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