Block entanglement entropy of ground states with long-range magnetic order

被引：11

作者：

Ding, Wenxin ^{[1
]}

Bonesteel, Nicholas E.

Yang, Kun

机构：

[1] Florida State Univ, NHMFL, Tallahassee, FL 32306 USA

来源：

PHYSICAL REVIEW A | 2008年 / 77卷 / 05期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevA.77.052109

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper we calculate the block entanglement entropies of spin models whose around states have perfect antiferromagnetic or ferromagnetic long-range order. In the latter case the definition of entanglement entropy is extended to properly take into account the ground state degeneracy. We find in both cases the entropy grows logarithmically with the block size. Implication of our results on states with general long-range order will be discussed.

引用

页数：9

共 31 条

[1] von Neumann capacity of noisy quantum channels [J].