Entanglement dynamics of a Heisenberg chain with Dzyaloshinskii-Moriya interaction  

作　　者：郑强 张小平 支启军 任中洲 

机构地区：[1]Department of Physics,Nanjing University [2]School of Mathematics and Computer-Science,Guizhou Normal University [3]School of Physics and Electronics,Guizhou Normal University

出　　处：《Chinese Physics B》2009年第8期3210-3214,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos 10535010,10775123 and 10865004);Research Fund of the Education Ministry of China (Grant No 20070284016)

摘　　要：This paper investigates the entanglement dynamics of the system, composed of two qubits A and B with Heisenberg XX spin interactation. There is a third controller qubit C, which only has Dzyaloshinskii-Moriya （DM） spin-orbit interaction with the qubit B. It is found that depending on the initial state of the controller qubit C and DM interaction, the entanglement of the system displays amplification and sudden birth effects. These effects indicate that one can control the entanglement of the system, which may be helpful for quantum information processing.This paper investigates the entanglement dynamics of the system, composed of two qubits A and B with Heisenberg XX spin interactation. There is a third controller qubit C, which only has Dzyaloshinskii-Moriya （DM） spin-orbit interaction with the qubit B. It is found that depending on the initial state of the controller qubit C and DM interaction, the entanglement of the system displays amplification and sudden birth effects. These effects indicate that one can control the entanglement of the system, which may be helpful for quantum information processing.

关 键 词：entanglement sudden birth entanglement amplification DM interaction 

分 类 号：O413.1[理学—理论物理]