Effects of inhomogeneous magnetic fields and different DzyaloshinskiiMoriya interaction on entanglement and teleportation in a two-qubit Heisenberg XYZ chain  

作　　者：秦猛 王晓 李延标 白忠 林上金 

机构地区：[1]College of Sciences, PLA University of Science and Technology

出　　处：《Chinese Physics C》2013年第11期9-13,共5页中国物理C（英文版）

基　　金：Supported by PLA University of Science and Technology Youth Foundation of College of Sciences(KYLYZL001313)

摘　　要：In this paper we calculate the thermal entanglement and teleportation in a two-qubit Heisenberg XYZ chain with the different Dzyaloshinskii-Moriya interaction and inhomogeneous magnetic fields. The analytical expres- sions of the concurrence and the average fidelity are obtained for this model. We have shown that the quantum phase transition occurs in the system and the quantum phase transition point depends on the inhomogeneity of magnetic fields. We compare the x-component Dzyaloshinskii-Moriya interaction with the z-component Dzyaloshinskii-Moriya interaction on the effects of quantum teleportation. It is found that we can take Dzyaloshinskii-Moriya interaction as one of the effective control parameters for the teleportation manipulation.In this paper we calculate the thermal entanglement and teleportation in a two-qubit Heisenberg XYZ chain with the different Dzyaloshinskii-Moriya interaction and inhomogeneous magnetic fields. The analytical expres- sions of the concurrence and the average fidelity are obtained for this model. We have shown that the quantum phase transition occurs in the system and the quantum phase transition point depends on the inhomogeneity of magnetic fields. We compare the x-component Dzyaloshinskii-Moriya interaction with the z-component Dzyaloshinskii-Moriya interaction on the effects of quantum teleportation. It is found that we can take Dzyaloshinskii-Moriya interaction as one of the effective control parameters for the teleportation manipulation.

关 键 词：ENTANGLEMENT TELEPORTATION different Dzyaloshinskii-Moriya interaction 

分 类 号：O431.2[机械工程—光学工程]