Entanglement, fidelity, and quantum phase transition in antiferromagnetic-ferromagnetic alternating Heisenberg chain

被引：0
|
作者：
J. Ren
S. Zhu
机构：
[1] School of Physical Science and Technology,
[2] Suzhou University,undefined
来源：
The European Physical Journal D | 2008年 / 50卷
关键词：
03.67.-a Quantum information; 03.65.Ud Entanglement and quantum nonlocality; 75.10.Pq Spin chain models;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The fidelity and entanglement entropy in an antiferromagnetic-ferromagnetic alternating Heisenberg chain are investigated by using the method of density-matrix renormalization-group. The effects of anisotropy on fidelity and entanglement entropy are investigated. The relations between fidelity, entanglement entropy and quantum phase transition are analyzed. It is found that the quantum phase transition point can be well characterized by both the ground-state entropy and fidelity for large system.
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页码：103 / 105
页数：2
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