Ground-state entanglement in the XXZ model

被引：97

作者：

Gu, SJ ^{[1
]}

Tian, GS

Lin, HQ

机构：

[1] Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[2] Chinese Univ Hong Kong, Inst Theoret Phys, Hong Kong, Hong Kong, Peoples R China

[3] Peking Univ, Sch Phys, Beijing 100871, Peoples R China

来源：

PHYSICAL REVIEW A | 2005年 / 71卷 / 05期

关键词：

D O I：

10.1103/PhysRevA.71.052322

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, we investigate spin entanglement in the XXZ model defined on a d-dimensional bipartite lattice. The concurrence, a measure of the entanglement between two spins, is analyzed. We prove rigorously that the ground-state concurrence reaches maximum at the isotropic point. For dimensionality d >= 2, the concurrence develops a cusp at the isotropic point and we attribute it to the existence of magnetic long-range order.

引用

页数：5

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