Non-Gaussianity and decoherence of generalized photon-added coherent state as a Hermite-excited coherent state  

作　　者：Li Heng-Mei Xu Xue-Fen 李恒梅;许雪芬(School of Science,Changzhou Institute of Technology,Changzhou 213002,China;School of Mathematics and Physics,Jiangsu Teachers University of Technology,Changzhou 213001,China)

机构地区：[1]School of Science,Changzhou Institute of Technology,Changzhou 213002,China [2]School of Mathematics and Physics,Jiangsu Teachers University of Technology,Changzhou 213001,China

出　　处：《Chinese Physics B》2012年第2期292-300,共9页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.11174114);the Research Foundation of Changzhou Institute of Technology,China (Grant No.YN1007)

摘　　要：Generalized photon-added coherent state （GPACS） is creation and annihilation operations on the coherent state. obtained by repeatedly acting the combination of Bose It is found that GPACS can be regarded as a Hermiteexcited coherent state due to its normalization factor related to a Hermite polynomial. In addition, we adopt the Hilbert-Schmidt distance to quantify the non-Gaussian character of GPACS and discuss the decoherence of GPACS in dissipative channel by studying the loss of nonclassicality in reference of the negativity of Wigner function.Generalized photon-added coherent state （GPACS） is creation and annihilation operations on the coherent state. obtained by repeatedly acting the combination of Bose It is found that GPACS can be regarded as a Hermiteexcited coherent state due to its normalization factor related to a Hermite polynomial. In addition, we adopt the Hilbert-Schmidt distance to quantify the non-Gaussian character of GPACS and discuss the decoherence of GPACS in dissipative channel by studying the loss of nonclassicality in reference of the negativity of Wigner function.

关 键 词：generalized photon-added coherent state Hermite polynomial NON-GAUSSIANITY the negativity of Wigner function 

分 类 号：O431.2[机械工程—光学工程]