Thermal Quantum Discord in Pure Dzyaloshinskii–Moriya Model with Magnetic Field  

作　　者：李大创 李小曼 曹卓良 

机构地区：[1]Institute for Quantum Control and Quantum Information and School of Electronic and Information Engineering, Hefei Normal University, Hefei 230601, China [2]Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China [3]School of Physics Material Science, Anhui University, Hefei 230039, China

出　　处：《Communications in Theoretical Physics》2016年第6期691-694,共4页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos.11204061,11374085,11104057,and 11204002;the Anhui Provincial Natural Science Foundation under Grant No.1408085MA16;the Anhui Provincial Candidates for Academic and Technical Leaders Foundation under Grant No.2015H052;the discipline top-notch talents Foundation,the Excellent Young Talents Support Plan of Anhui Provincial Universities;supported by National Natural Science Foundation of China under Grant No.11274010;the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No.20113401110002;the 211 Project of Anhui University,and the Personnel Department of Anhui Province

摘　　要：We investigate the effects of the directions of Dzyaloshinskii–Moriya(DM) interaction vector and magnetic field on the quantum discord in the pure DM model. For different directions of DM vector, we find that there are different optimal parameter components of magnetic field. Moreover, we find that the optimal parameter components rules are the same for the Hamiltonian H_1 and H_2. According to the rules, for a certain axial DM vector, we can get the maximal quantum discord by adjusting the direction of the external magnetic field, which is feasible under the current experimental technology.

关 键 词：quantum discord Heisenberg model Dzyaloshinskii–Moriya interaction 

分 类 号：O413[理学—理论物理] TM311[理学—物理]