中国物理B ›› 2008, Vol. 17 ›› Issue (4): 1254-1262.doi: 10.1088/1674-1056/17/4/018

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Wigner functions and tomograms of the photon-depleted even and odd coherent states

王继锁, 孟祥国   

  1. Department of Physics, Liaocheng University, Liaocheng 252059, China
  • 收稿日期:2007-07-09 修回日期:2007-08-02 出版日期:2008-04-01 发布日期:2008-04-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10574060) and the Natural Science Foundation of Shandong Province of China (Grant No Y2004A09).

Wigner functions and tomograms of the photon-depleted even and odd coherent states

Wang Ji-Suo(王继锁) and Meng Xiang-Guo(孟祥国)   

  1. Department of Physics, Liaocheng University, Liaocheng 252059, China
  • Received:2007-07-09 Revised:2007-08-02 Online:2008-04-01 Published:2008-04-01
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10574060) and the Natural Science Foundation of Shandong Province of China (Grant No Y2004A09).

摘要: Using the coherent state representation of Wigner operator and the technique of integration within an ordered product (IWOP) of operators, this paper derives the Wigner functions for the photon-depleted even and odd coherent states (PDEOCSs). Moreover, in terms of the Wigner functions with respect to the complex parameter $\alpha $ the nonclassical properties of the PDEOCSs are discussed. The results show that the nonclassicality for the state $\left| {\beta ,m} \right\rangle _{\rm o} $ (or $\left| {\beta ,m} \right\rangle _{\rm e} )$ is more pronounced when $m$ is even (or odd). According to the marginal distributions of the Wigner functions, the physical meaning of the Wigner functions is given. Further, the tomograms of the PDEOCSs are calculated with the aid of newly introduced intermediate coordinate-momentum representation in quantum optics.

Abstract: Using the coherent state representation of Wigner operator and the technique of integration within an ordered product (IWOP) of operators, this paper derives the Wigner functions for the photon-depleted even and odd coherent states (PDEOCSs). Moreover, in terms of the Wigner functions with respect to the complex parameter $\alpha $ the nonclassical properties of the PDEOCSs are discussed. The results show that the nonclassicality for the state $\left| {\beta ,m} \right\rangle _{\rm o} $ (or $\left| {\beta ,m} \right\rangle _{\rm e} )$ is more pronounced when $m$ is even (or odd). According to the marginal distributions of the Wigner functions, the physical meaning of the Wigner functions is given. Further, the tomograms of the PDEOCSs are calculated with the aid of newly introduced intermediate coordinate-momentum representation in quantum optics.

Key words: photon-depleted even and odd coherent state, Wigner function, intermediate coordinate-momentum representation, tomogram

中图分类号: 

  • 42.50.Ar