Thermal entangled quantum heat engine

Xian He, Jizhou He and Jie Zheng

Physica A: Statistical Mechanics and its Applications, 2012, vol. 391, issue 24, 6594-6600

Abstract: Based on a two-qubit Heisenberg XY model, we construct a four-level entangled quantum heat engine (QHE). It is an interesting quantum Otto cycle where the exchange constant is fixed and only the magnetic field is varied during the adiabatic steps. The expressions for several thermodynamic quantities such as the heat transferred, the work and the efficiency are derived. Moreover, the influence of the entanglement on the thermodynamic quantities is investigated numerically. Several interesting features of the variation of the heat transferred, the work and the efficiency with the concurrences of the thermal entanglement of different thermal equilibrium states are obtained. Finally, we discussed the maximum efficiency of the QHE.

Keywords: Nonequilibrium and irreversible thermodynamics; Quantum entangled heat engine; Thermal entanglement (search for similar items in EconPapers)
Date: 2012
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:391:y:2012:i:24:p:6594-6600

DOI: 10.1016/j.physa.2012.07.050

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