Ground-State and Thermal Entanglement in Three-Spin Heisenberg-XXZ Chain with Three-Spin Interaction

被引：1
作者：
ZHANG Yong LONG GuiLu Key Laboratory for Quantum Information and MeasurementsDepartment of PhysicsTsinghua UniersityBeijing China Department of PhysicsBeijing Uniersity of Posts and TelecommunicationsBeijing China Key Laboratory for Atomic and Molecular NanoSciencesTsinghua UniersityBeijing China [1 ,2 ,1 ,3 ,1 ,100084 ,2 ,100876 ,3 ,100084 ]
机构：
来源：
CommunicationsinTheoreticalPhysics | 2007年 / 48卷 / 08期
关键词：
spin chain; thermal entanglement; quantum phase transition;
D O I：
暂无
中图分类号：
O413 [量子论];
学科分类号：
070201 ;
摘要：
<正> The entanglement properties of a three-spin X X Z Heisenberg chain with three-spin interaction are studiedby means of concurrence of pairwise entanglement.We show that ground-state pairwise entanglement,pairwise thermalentanglement,or quantum phase transition is not present in antiferromagnetic spin chain.For the ferromagnetic case,quantum phase transition takes place at △=1 for anisotropic interaction and at some values of three-spin couplingstrength,and pairwise thermal entanglement increases when the value of J/T increases and with anisotropic interactionand three-spin interaction decrease.In addition,we find that increasing the anisotropic interaction and the three-spininteraction will decrease critical temperature.
引用
收藏
页码：249 / 254
页数：6
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