Entangled quantum heat engine based on two-qubit Heisenberg XY model

被引：25

作者：

He Ji-Zhou ^{[1
]}

He Xian ^{[1
]}

Zheng Jie ^{[1
]}

机构：

[1] Nanchang Univ, Dept Phys, Nanchang 330031, Peoples R China

来源：

CHINESE PHYSICS B | 2012年 / 21卷 / 05期

基金：

中国国家自然科学基金;

关键词：

isotropic Heisenberg XY model; thermal entanglement; quantum heat engine; performance characteristics; CYCLE WORKING; PERFORMANCE; SYSTEMS;

D O I：

10.1088/1674-1056/21/5/050303

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Based on a two-qubit isotropic Heisenberg XY model under a constant external magnetic field, we construct a four-level entangled quantum heat engine (QHE). The expressions for the heat transferred, the work, and the efficiency are derived. Moreover, the influence of the entanglement on the thermodynamic quantities is investigated analytically and numerically. Several interesting features of the variations of the heat transferred, the work, and the efficiency with the concurrences of the thermal entanglement of two different thermal equilibrium states in zero and nonzero magnetic fields are obtained.

引用

页数：6

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