磁场作用下海森堡模型的热纠缠传态  

Thermal Entanglement and Teleportation in the Heisenberg Model with Magnetic Field

作　　者：陈涛[1] 刘霞[2] 

机构地区：[1]湖北师范学院物理与电子科学学院,湖北黄石435002 [2]宜春学院理工学院,江西宜春336000

出　　处：《河北师范大学学报（自然科学版）》2009年第2期184-188,共5页Journal of Hebei Normal University：Natural Science

基　　金：湖北师范学院校自然科学基金(2007D21)

摘　　要：研究了均匀磁场作用下的两量子比特XXZ海森堡模型的热纠缠,并且以此热纠缠混合态作为量子信道传输两量子比特的纠缠纯态,计算出输出态的纠缠度和传态的平均保真度,讨论了温度、磁场、各向异性参数对纠缠度和平均保真度的影响.The thermal entanglement of a two-qubit XXZ Heisenberg model in a homogeneous magnetic field is studied,and this model is used as quantum channel to teleport a two-qubit pure state,then the concurrence of teleported state and the average fidelity of teleportation are calculated,finally the influences on the concurrence and average fidelity in terms of the parameters of the Hamiltonian and T are discussed.

关 键 词：热纠缠态 纠缠度 保真度 量子传态 

分 类 号：O431.1[机械工程—光学工程]