Entanglement and heat capacity in a two-atom Bose-Hubbard model

被引：5

作者：

Leggio, B. ^{[1
]}

Napoli, A. ^{[1
]}

Messina, A. ^{[1
]}

机构：

[1] Univ Palermo, Dipartimento Fis, I-90123 Palermo, Italy

来源：

PHYSICS LETTERS A | 2012年 / 376卷 / 04期

关键词：

QUANTUM PHASE-TRANSITION;

D O I：

10.1016/j.physleta.2011.10.075

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that a two-atom Bose-Hubbard model exhibits three different phases in the behavior of thermal entanglement in its parameter space. These phases are demonstrated to be traceable back to the existence of level crossings in the ground state of the same system. Significant similarities between the behaviors of thermal entanglement and heat capacity in the parameter space are brought to light thus allowing to interpret the occurrence and the meaning of all these three phases. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：339 / 343

页数：5

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