Teleportation and thermal entanglement in two-qubit Heisenberg X Y Z spin chain with the Dzyaloshinski-Moriya interaction and the inhomogeneous magnetic field  

作　　者：高丹 赵振双 朱爱东 王洪福 邵晓强 张寿 

机构地区：[1]Department of Physics,College of Science,Yanbian University [2]Center for the Condensed-Matter Science and Technology,Department of Physics,Harbin Institute of Technology

出　　处：《Chinese Physics B》2010年第9期150-154,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.60667001)

摘　　要：This paper studies the average fidelity of teleportation and thermal entanglement for a two-qubit Heisenberg XYZ chain in the presence of both an inhomogeneous magnetic field and a Dzyaloshinski-Moriya interaction. It shows that for a fixed Dz, the increase of bz will broaden the critical temperature at the cost of decreasing the thermal entanglement. And it can modulate the inhomogeneous magnetic field and the Dzyaloshinski-Moriya interaction for the average fidelity of teleportation to be optimal.This paper studies the average fidelity of teleportation and thermal entanglement for a two-qubit Heisenberg XYZ chain in the presence of both an inhomogeneous magnetic field and a Dzyaloshinski-Moriya interaction. It shows that for a fixed Dz, the increase of bz will broaden the critical temperature at the cost of decreasing the thermal entanglement. And it can modulate the inhomogeneous magnetic field and the Dzyaloshinski-Moriya interaction for the average fidelity of teleportation to be optimal.

关 键 词：TELEPORTATION thermal entanglement Heisenberg XYZ spin chain 

分 类 号：O413.1[理学—理论物理]