Performance of a two-state quantum engine improved by the superposition effect

Performance of a two-state quantum engine improved by the superposition effect
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通过叠加效应提高二态量子发动机的性能

DOI:
10.1007/s11433-013-5318-8
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发表时间:
2013-08
期刊:
中国科学 物理学 力学 天文学(英文版)
影响因子:
--
通讯作者:
Chen JinCan
Chen JinCan
中科院分区:
其他
文献类型:
--
作者:
Ou CongJie;Huang ZhiFu;Lin BiHong;Chen JinCan

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分析了两态量子引擎在不同条件下的性能。结果表明,量子引擎的效率可以提高叠加的本征态在开始的周期。利用势壁的有限时间运动,可以得到量子发动机的功率输出以及最大功率输出(EMP)时的效率。采用广义势统一描述了一类二能级量子引擎。结果清楚地表明,这些引擎的性能依赖于外部势,量子引擎的几何配置,和叠加效应。此外,发现叠加效应将扩大量子引擎的最佳工作区域。
The performance of a two-state quantum engine under different conditions is analyzed. It is shown that the efficiency of the quantum engine can be enhanced by superposing the eigenstates at the beginning of the cycle. By employing the finite-time movement of the potential wall, the power output of the quantum engine as well as the efficiency at the maximum power output (EMP) can be obtained. A generalized potential is adopted to describe a class of two-level quantum engines in a unified way. The results obtained show clearly that the performances of these engines depend on the external potential, the geometric configuration of the quantum engines, and the superposition effect. Moreover, it is found that the superposition effect will enlarge the optimally operating region of quantum engines.
线性、超线性和亚线性不可逆卡诺式热机最大功率下的效率界限
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