中国物理B ›› 2009, Vol. 18 ›› Issue (11): 4657-4661.doi: 10.1088/1674-1056/18/11/008

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Wigner function and density operator of the photon-subtracted squeezed thermal state

胡利云1, 范洪义2   

  1. (1)College of Physics \& Communication Electronics, Jiangxi Normal University, Nanchang 330022, China;Department of Physics, Shanghai Jiao Tong University, Shanghai 200030, China; (2)Department of Physics, Shanghai Jiao Tong University, Shanghai 200030, China
  • 收稿日期:2008-08-11 修回日期:2009-02-23 出版日期:2009-11-20 发布日期:2009-11-20
  • 基金资助:
    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.

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)   

  1. a College of Physics & Communication Electronics, Jiangxi Normal University, Nanchang 330022, China; b Department of Physics, Shanghai Jiao Tong University, Shanghai 200030, China
  • Received:2008-08-11 Revised:2009-02-23 Online:2009-11-20 Published:2009-11-20
  • Supported by:
    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.

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摘要： 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.

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.

Key words: Wigner function, photon-subtraction, squeezed thermal state, integration with in an ordered product technique

中图分类号:  (Quantum state engineering and measurements)

  • 42.50.Dv
03.65.Db (Functional analytical methods)