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Thermal entangled quantum heat engine

机译:热纠缠量子热机

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摘要

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.
机译:基于两个量子位的海森堡XY模型,我们构造了一个四能级纠缠量子热机(QHE)。这是一个有趣的量子奥托循环,其中交换常数是固定的,并且在绝热步骤中仅磁场发生变化。导出了几个热力学量的表达式,例如传热,功和效率。此外,数值研究了纠缠对热力学量的影响。在不同热平衡状态的热纠缠的同时,获得了传热变化,功和效率的几个有趣特征。最后,我们讨论了QHE的最大效率。

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