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

doi:10.1088/1674-1056/21/5/050303

中国物理B ›› 2012, Vol. 21 ›› Issue (5): 50303-050303.doi: 10.1088/1674-1056/21/5/050303

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

何济洲,何弦,郑洁

Department of Physics, Nanchang University, Nanchang 330031, China

收稿日期:2011-04-14 修回日期:2012-04-27 出版日期:2012-04-01 发布日期:2012-04-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11065008)

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

He Ji-Zhou(何济洲)^†, He Xian(何弦), and Zheng Jie(郑洁)

Department of Physics, Nanchang University, Nanchang 330031, China

Received:2011-04-14 Revised:2012-04-27 Online:2012-04-01 Published:2012-04-01
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11065008)

摘要/Abstract

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.

关键词: isotropic Heisenberg XY model, thermal entanglement, quantum heat engine, performance characteristics

Abstract: 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.

Key words: isotropic Heisenberg XY model, thermal entanglement, quantum heat engine, performance characteristics

中图分类号: (Entanglement and quantum nonlocality)

03.65.Ud

05.70.-a (Thermodynamics) 07.20.Pe (Heat engines; heat pumps; heat pipes)

何济洲,何弦,郑洁. Entangled quantum heat engine based on two-qubit Heisenberg XY model[J]. 中国物理B, 2012, 21(5): 50303-050303.

He Ji-Zhou(何济洲), He Xian(何弦), and Zheng Jie(郑洁) . Entangled quantum heat engine based on two-qubit Heisenberg XY model[J]. Chin. Phys. B, 2012, 21(5): 50303-050303.

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

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

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