海森堡XXX模型热纠缠信道中的量子隐形传送(英文)  

Teleportation via thermally entangled state of a two-qubit Heisenberg XXX chain

作　　者：沙金巧[1,2] 方建兴[2] 

机构地区：[1]苏州科技学院数理学院,江苏苏州215009 [2]苏州大学物理科学与技术学院,江苏苏州215006

出　　处：《苏州大学学报（自然科学版）》2009年第1期61-65,共5页Journal of Soochow University(Natural Science Edition)

基　　金：Supported by the National Science Foundation of China(10774108).

摘　　要：研究了以一维海森堡XXX链作为量子通道,实现了两粒子纯态的量子隐形传送.为了表明传输效果,给出了传输过程中的平均保真度.发现当外加磁场较低,并且温度T小于2Jkln5时,平均保真度大于经典通道的传输极限值2/3.The teleportation of a two-qubit pure state through 1 D Heisenberg XXX chain as a quantum channel is investigated. To quantify the degree of the teleportation, we give the average fidelity of the transmission. When the temperature T is lower than the value of 2J/kln5 with lower external magnetic field B,we get the fidelity larger than 2/3 which is the limited value of any classical communication.

关 键 词：量子纠缠 隐形传送 海森堡链 

分 类 号：O43[机械工程—光学工程]