Control of entanglement sudden death induced by Dzyaloshinskii-Moriya interaction  

作　　者：郑强 孙萍 张小平 任中洲 

机构地区：[1]School of Mathematics and Computer Science,Guizhou Normal University [2]Department of Physics,Nanjing University

出　　处：《Chinese Physics C》2010年第10期1583-1586,共4页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10535010,10775123);Natural Science and Technology Foundation of Guizhou Province ([2009]2267);Doctor Funding of Guizhou Normal University

摘　　要：We investigate the entanglement dynamics of a system composed of two non-interacting qubits, A and B. A third qubit, C, only has the Dzyaloshinskii-Moriya （DM） spin-orbit interaction with qubit B. We find that the DM interaction can induce the entanglement sudden death （ESD） of the system qubits A and B, and properly mixing the initial state of the system and adjusting the state of qubit C are two effective methods of controlling ESD.We investigate the entanglement dynamics of a system composed of two non-interacting qubits, A and B. A third qubit, C, only has the Dzyaloshinskii-Moriya （DM） spin-orbit interaction with qubit B. We find that the DM interaction can induce the entanglement sudden death （ESD） of the system qubits A and B, and properly mixing the initial state of the system and adjusting the state of qubit C are two effective methods of controlling ESD.

关 键 词：entanglement sudden death Dzyaloshinskii-Moriya interaction CONTROL 

分 类 号：O413[理学—理论物理]