Statistical properties of coherent photon-subtracted two-mode squeezed vacuum and its application in quantum teleportation  

作　　者：张国平 郑凯敏 刘世右 胡利云 

机构地区：[1]College of Physics and Communication Electronics,Jiangxi Normal University [2]Key Laboratory of Optoelectronic and Telecommunication of Jiangxi

出　　处：《Chinese Physics B》2014年第5期46-51,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11264018);the Natural Science Foundation of Jiangxi Province,China(Grant No.20132BAB212006)

摘　　要：We introduce a kind of non-Gaussian entangled state, which can be obtained by operating a non-local coherent photon-subtraction operation on a two-mode squeezed vacuum. It is found that its normalization factor is only related to the Legendre polynomials, which is a compact expression. Its statistical properties are discussed by the negative region Wigner function with the analytical expression. As an application, the quantum teleportation for coherent states is considered by using the non-Gaussian state as an entangled channel. It is found that the teleportation fidelity can be enhanced by this non-Gaussian operation.We introduce a kind of non-Gaussian entangled state, which can be obtained by operating a non-local coherent photon-subtraction operation on a two-mode squeezed vacuum. It is found that its normalization factor is only related to the Legendre polynomials, which is a compact expression. Its statistical properties are discussed by the negative region Wigner function with the analytical expression. As an application, the quantum teleportation for coherent states is considered by using the non-Gaussian state as an entangled channel. It is found that the teleportation fidelity can be enhanced by this non-Gaussian operation.

关 键 词：coherent photon subtraction two-mode squeezed vacuum quantum teleportation FIDELITY 

分 类 号：O413.1[理学—理论物理] TP391.41[理学—物理]