A Measure of Non-Classicality of Even and Odd Coherent States  

作　　者：叶永华 李志坚 曾高坚 

机构地区：[1]Department of Physics, Xiangnan University, Chenzhou 423000 [2]Physical and Electronic Department, Hunan First Normal College, Changsha 410002 [3]Information Science College, Hunan Normal University, Changsha 410081

出　　处：《Chinese Physics Letters》2008年第4期1175-1178,共4页中国物理快报（英文版）

摘　　要：A measure of non-classicality of even and odd coherent states is studied. We first calculate the Wigner functions of the even and odd coherent states, which consists of two terms： the positive-definite Gaussian term and the wave term with negativity, and then calculate the integrated value εmax of the wave term of the Wigner functions of the even and odd coherent states in their area with negativity, and use εmax to measure non-classicality of the even and odd coherent states. For the even and odd coherent states with certain photon count, it is very convenient for us to use εmax to measure their non-classicality. The methods of our definition and calculation for εmax have theoretical reference value.A measure of non-classicality of even and odd coherent states is studied. We first calculate the Wigner functions of the even and odd coherent states, which consists of two terms： the positive-definite Gaussian term and the wave term with negativity, and then calculate the integrated value εmax of the wave term of the Wigner functions of the even and odd coherent states in their area with negativity, and use εmax to measure non-classicality of the even and odd coherent states. For the even and odd coherent states with certain photon count, it is very convenient for us to use εmax to measure their non-classicality. The methods of our definition and calculation for εmax have theoretical reference value.

关 键 词：WIGNER FUNCTION N-COMPONENTS SUPERPOSITION DECOHERENCE 

分 类 号：O45[理学—无线电物理]