Quantum Discord and Entanglement in Heisenberg XXZ Spin Chain after Quenches  

作　　者：REN Jie WU Yin-Zhong ZHU Shi-Qun 任杰;吴银忠;朱士群(Department of Physics and Jiangsu Laboratory of Advanced Functional Material,Changshu Institute of Technology,Changshu 215500;School of Physical Science and Technology,Soochow University,Suzhou,Jiangsu 215006)

机构地区：[1]Department of Physics and Jiangsu Laboratory of Advanced Functional Material,Changshu Institute of Technology,Changshu 215500 [2]School of Physical Science and Technology,Soochow University,Suzhou,Jiangsu 215006

出　　处：《Chinese Physics Letters》2012年第6期31-34,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 11104021,11074184 and 11047007.

摘　　要：Using the adaptive time-dependent density-matrix renormalization group method,the dynamics of entanglement and quantum discord of an one-dimensional spin-1/2 XXZ chain is studied when anisotropic interaction quenches are applied at different temperatures.The dynamics of the quantum discord and pairwise entanglement between the nearest qubits shows that the entanglement and quantum discord will first oscillate and then approach to a constant value.The quantum discord can be used to predict the quantum phase transition,while the entanglement cannot.

关 键 词：VALUE QUANTUM HEISENBERG 

分 类 号：O41[理学—理论物理]