Wigner function and density operator of the photon-subtracted squeezed thermal state
Hu Li-Yun(胡利云)a)b)† and Fan Hong-Yi(范洪义)b)
a College of Physics & Communication Electronics, Jiangxi Normal University, Nanchang 330022, China; b Department of Physics, Shanghai Jiao Tong University, Shanghai 200030, China
Abstract By using the technique of integration within an ordered product of operators, the normal ordered density operator of the photon-subtracted squeezed thermal state (PSSTS) is derived. Then the corresponding Wigner function is presented by using the coherent state representation of the Wigner operator. The nonclassical properties of the PSSTS are discussed based on the negativity of the Wigner function.
Received: 11 August 2008
Revised: 23 February 2009
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 10775097 and
10874174) and the Research Foundation of the Education Department of
Jiangxi Province of China.
Cite this article:
Hu Li-Yun(胡利云) and Fan Hong-Yi(范洪义) Wigner function and density operator of the photon-subtracted squeezed thermal state 2009 Chin. Phys. B 18 4657
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