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A thermal entangled quantum refrigerator based on a two-qubit Heisenberg model with Dzyaloshinskii-Moriya interaction in an external magnetic field |
Wang Hao (汪浩), Wu Guo-Xing (吴国兴) |
Tianhua College, Shanghai Normal University, Shanghai 201815, China |
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Abstract Based on an isotropic two spin-1/2 qubits Heisenberg model with the Dzyaloshinskii-Moriya interaction in an external magnetic field, we have constructed an entangled quantum refrigerator. Expressions for the basic thermodynamic quantities, i.e., the heat exchanged, the net work input, and the coefficient of performance, are derived. Some intriguing features and their qualitative explanations in zero and non zero magnetic fields are given. The influence of the thermal entanglement on the refrigerator is investigated. The results obtained here have general significance and will be helpful to understand the performance of an entangled quantum refrigerator.
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Received: 24 August 2012
Revised: 13 November 2012
Accepted manuscript online:
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PACS:
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05.70.Ln
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(Nonequilibrium and irreversible thermodynamics)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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07.20.Pe
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(Heat engines; heat pumps; heat pipes)
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Fund: Project supported by the Program for Excellent Young Teachers Foundation of Shanghai, China (Grant No. thc-20100036). |
Corresponding Authors:
Wang Hao
E-mail: shnuwh@163.com
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Cite this article:
Wang Hao (汪浩), Wu Guo-Xing (吴国兴) A thermal entangled quantum refrigerator based on a two-qubit Heisenberg model with Dzyaloshinskii-Moriya interaction in an external magnetic field 2013 Chin. Phys. B 22 050512
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