Entanglement in a spin-one spin chain

被引：19
|
作者：
Zhang, GF
Li, SS
机构：
[1] Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China
[2] CCAST, World Lab, China Ctr Adv Sci & Technol, Beijing 100080, Peoples R China
来源：
SOLID STATE COMMUNICATIONS | 2006年 / 138卷 / 01期
关键词：
thermal entanglement; two-spin-qubit system; negativity;
D O I：
10.1016/j.ssc.2006.01.040
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The thermal entanglement in a two-spin-qutrit system with two spins coupled by exchange interaction is investigated in terms of the measure of entanglement called 'negativity'. We strictly show that for any temperature the entanglement is symmetric with respect to zero magnetic field. The behavior of negativity is presented for four different cases. We find that the entanglement may be enhanced under a nonuniform magnetic field. Because there is not any necessary and sufficient condition for quantum separability in systems of dimension 3 circle times 3, our results are qualitative, not quantitative. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：17 / 21
页数：5
相关论文
共 50 条
  • [31] Effect of Dzialoshinski-Moriya interaction on thermal entanglement of a mixed-spin chain
    Ma XiaoSan
    Zhang JiaYan
    Cong HongShou
    Wang AnMin
    SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY, 2008, 51 (12): : 1897 - 1904
  • [32] Effect of Dzialoshinski-Moriya interaction on thermal entanglement of a mixed-spin chain
    MA XiaoSan1↑
    2 Department of Modern Physics
    Science China(Physics,Mechanics & Astronomy), 2008, (12) : 1897 - 1904
  • [33] Thermal entanglement in molecular spin rings
    侯净敏
    杜龙
    丁伽焱
    张文新
    Chinese Physics B, 2010, 19 (11) : 121 - 127
  • [34] Thermal Entanglement of an XY Two-Qutrit Spin Chain with Dzialoshinski—Moriya Interaction
    MA Xiao-San~1 and WANG An-Min~21 School of Electric Engineering and Information
    CommunicationsinTheoreticalPhysics, 2009, 52 (11) : 825 - 828
  • [35] Effect of Dzialoshinski-Moriya interaction on thermal entanglement of a mixed-spin chain
    XiaoSan Ma
    JiaYan Zhang
    HongShou Cong
    AnMin Wang
    Science in China Series G: Physics, Mechanics and Astronomy, 2008, 51 : 1897 - 1904
  • [36] Thermal entanglement in molecular spin rings
    Hou Jing-Min
    Du Long
    Ding Jia-Yan
    Zhang Wen-Xin
    CHINESE PHYSICS B, 2010, 19 (11)
  • [37] Entanglement in the Extended XY Spin Model with Three Spin Interaction and External Field
    Zhang, Xiu-Xing
    Yin, Xun-Chang
    Sun, Guang-Hou
    Shan, Chuan-Jia
    INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS, 2010, 49 (07) : 1507 - 1515
  • [38] Ground-state and thermal entanglement in three-spin Heisenberg-X X Z chain with three-spin interaction
    Zhang Yong
    Long Gui-Lu
    COMMUNICATIONS IN THEORETICAL PHYSICS, 2007, 48 (02) : 249 - 254
  • [39] Anisotropy and magnetic field effects on entanglement of a two-spin (1/2,1) mixed-spin Heisenberg XY chain
    Wang Fei
    Fu Li-Ping
    Guo Ke-Tao
    COMMUNICATIONS IN THEORETICAL PHYSICS, 2008, 50 (02) : 341 - 344
  • [40] Anisotropy and Magnetic Field Effects on Entanglement of a Two-Spin (1/2,1) Mixed-Spin Heisenberg XY Chain
    WANG Fei~1 FU Li-Ping~1 GUO Ke-Tao~21 School of Physical Science and Technology
    CommunicationsinTheoreticalPhysics, 2008, 50 (08) : 341 - 344
12345