Thermal entanglement in the anisotropic Heisenberg XXZ model with the Dzyaloshinskii–Moriya interaction
Li, Da-Chuang; Wang, Xian-Ping; Cao, Zhuo-Liang; Li, Da-Chuang; Key Laboratory of Opto-electronic Information Acquisition and Manipulation (Ministry of Education), School of Physics and Material Science, Anhui University, Hefei 230039, People’s Republic of China; Wang, Xian-Ping; Key Laboratory of Opto-electronic Information Acquisition and Manipulation (Ministry of Education), School of Physics and Material Science, Anhui University, Hefei 230039, People’s Republic of China; Cao, Zhuo-Liang; Key Laboratory of Opto-electronic Information Acquisition and Manipulation (Ministry of Education), School of Physics and Material Science, Anhui University, Hefei 230039, People’s Republic of China ; Department of Physics, Hefei Teachers College, Hefei 230061, People’s Republic of China ;
Журнал:
Journal of Physics: Condensed Matter
Дата:
2008-08-13
Аннотация:
The thermal entanglement is investigated in a two-qubit Heisenberg XXZ system with Dzyaloshinskii–Moriya (DM) interaction. It is shown that the entanglement can be efficiently controlled by the DM interaction parameter and coupling coefficient J<sub>z</sub>. D<sub>x</sub> (the x-component parameter of the DM interaction) has a more remarkable influence on the entanglement and the critical temperature than D<sub>z</sub> (the z-component parameter of the DM interaction). Thus, by changing the DM interaction direction, we can get a more efficient control parameter to increase the entanglement and the critical temperature.
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