摘要
利用两个海森堡热纠缠信道,实现了一对量子纠缠态的隐形传送,求得输出的密度矩阵,进而算出隐形传送的保真度.分析外界环境(温度T和磁场B)对热纠缠及量子隐形传送的影响.发现在磁场较弱,温度很低的时候,以海森堡热纠缠混合态作为量子信道进行隐形传送优于经典信道·
Entanglement teleportation, using thermally entangled state of two two-qubit Heisenberg XX chain as resource, was carried out. The deferent density operator and the fidelity of teleportation were calculated. And then, how the entanglement teleportation depends on the temperature and the magnetic field was analyzed. The results show that the entanglement teleportation of the mixed quantum channel is superior to the classical communication when the magnetic field B is feebleness and the temperature T is very low.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2008年第5期1063-1066,共4页
Acta Photonica Sinica
基金
江苏省教育厅自然科学基金(Q1108404)
江苏技术师范学院青年科研基金项目(KYY06093)资助
关键词
隐形传送
热纠缠态
纠缠度
保真度
Teleportation
Thermally entangled state
Concurrence
Fidelity
