Teleportation of arbitrary unknown two-atom state with cluster state via thermal cavity  

作　　者：章文 刘益民 刘俊 张战军 

机构地区：[1]Key Laboratory of Optoelectronic Information Acquisition & Manipulation of Ministry of Education of China,School of Physics & Material Science,Anhui University [2]Department of Physics,Shaoguan University

出　　处：《Chinese Physics B》2008年第9期3203-3208,共6页中国物理B（英文版）

基　　金：supported by the Program for New Century Excellent Talents at the University of China (Grant No NCET-06-0554);the National Natural Science Foundation of China (Grant Nos 60677001 and 10747146);the Science-Technology Fund of AnhuiProvince for Outstanding Youth of China (Grant No 06042087);the Key Fund of the Ministry of Education of China (Grant No 206063);the Natural Science Foundation of Guangdong Province of China (Grant Nos 06300345 and 7007806);Natural Science Foundation of Hubei Province of China (Grant No 2006ABA354)

摘　　要：This paper proposes a scheme for implementing the teleportation of an arbitrary unknown two-atom state by using a cluster state of four identical 2-level atoms as quantum channel in a thermal cavity. The two distinct advantages of the present scheme are： （i） The discrimination of 16 orthonormal cluster states in the standard teleportation protocol is transformed into the discrimination of single-atom states. Consequently, the discrimination difficulty of states is degraded. （ii） The scheme is insensitive to the cavity field state and the cavity decay for the thermal cavity is only virtually excited when atoms interact with it. Thus, the scheme is more feasible.This paper proposes a scheme for implementing the teleportation of an arbitrary unknown two-atom state by using a cluster state of four identical 2-level atoms as quantum channel in a thermal cavity. The two distinct advantages of the present scheme are： （i） The discrimination of 16 orthonormal cluster states in the standard teleportation protocol is transformed into the discrimination of single-atom states. Consequently, the discrimination difficulty of states is degraded. （ii） The scheme is insensitive to the cavity field state and the cavity decay for the thermal cavity is only virtually excited when atoms interact with it. Thus, the scheme is more feasible.

关 键 词：TELEPORTATION thermal cavity atomic entangled state atomic cluster state 

分 类 号：O431.2[机械工程—光学工程] O562[理学—光学]