Efficiency at maximum power of a quantum heat engine based on two coupled oscillators

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	Efficiency at maximum power of a quantum heat engine based on two coupled oscillators
	Wang, JH; Ye, ZL; Lai, YM; Li, WS; He, JH
刊名	PHYSICAL REVIEW E
	2015
卷号	91 期号:6 页码:62134
通讯作者	Wang, JH (reprint author), Nanchang Univ, Dept Phys, Nanchang 330031, Peoples R China.
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.
学科主题	Physics
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
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/20953]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	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.
APA	Wang, JH,Ye, ZL,Lai, YM,Li, WS,&He, JH.(2015).Efficiency at maximum power of a quantum heat engine based on two coupled oscillators.PHYSICAL REVIEW E,91(6),62134.
MLA	Wang, JH,et al."Efficiency at maximum power of a quantum heat engine based on two coupled oscillators".PHYSICAL REVIEW E 91.6(2015):62134.