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题名: Efficiency at maximum power of a quantum heat engine based on two coupled oscillators
作者: Wang, JH;  Ye, ZL;  Lai, YM;  Li, WS;  He, JH
刊名: PHYSICAL REVIEW E
出版日期: 2015
卷号: 91, 期号:6, 页码:62134
学科分类: Physics
DOI: http://dx.doi.org/10.1103/PhysRevE.91.062134
通讯作者: Wang, JH (reprint author), Nanchang Univ, Dept Phys, Nanchang 330031, Peoples R China.
文章类型: Article
英文摘要: We propose and theoretically investigate a system of two coupled harmonic oscillators as a heat engine. We show how these two coupled oscillators within undamped regime can be controlled to realize an Otto cycle that consists of two adiabatic and two isochoric processes. During the two isochores the harmonic system is embedded in two heat reservoirs at constant temperatures T-h and T-c (< T-h), respectively, and it is tuned slowly along a protocol to realize an adiabatic process. To illustrate the performance in finite time of the quantum heat engine, we adopt the semigroup approach to model the thermal relaxation dynamics along the two isochoric processes, and we find the upper bound of efficiency at maximum power (EMP) eta* to be a function of the Carnot efficiency eta(C) (= 1 - T-c/T-h): eta* <= eta(+) equivalent to eta(2)(C) /[eta(C) - (1 - eta(C)) ln(1 - eta(C))], identical to those previously derived from ideal (noninteracting) microscopic, mesoscopic, and macroscopic systems.
类目[WOS]: Physics, Fluids & Plasmas ;  Physics, Mathematical
关键词[WOS]: FINITE-TIME THERMODYNAMICS ;  HARMONIC-OSCILLATORS ;  CARNOT ;  PERFORMANCE ;  SYSTEM ;  STATES ;  OUTPUT ;  CYCLE ;  MODEL
收录类别: SCI
项目资助者: National Natural Science Foundation of China [11265010, 11375045, 11365015] ;  Jiangxi Provincial Natural Science Foundation, China [20132BAB212009]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20953
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Recommended Citation:
Wang, JH,Ye, ZL,Lai, YM,et al. Efficiency at maximum power of a quantum heat engine based on two coupled oscillators[J]. PHYSICAL REVIEW E,2015,91(6):62134.
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