ITP OpenIR  > SCI期刊论文
Wang, JH; Ye, ZL; Lai, YM; Li, WS; He, JH; Wang, JH (reprint author), Nanchang Univ, Dept Phys, Nanchang 330031, Peoples R China.
Efficiency at maximum power of a quantum heat engine based on two coupled oscillators
Source PublicationPHYSICAL REVIEW E
Language英语
AbstractWe 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.
2015
Volume91Issue:6Pages:62134
Subject AreaPhysics
DOIhttp://dx.doi.org/10.1103/PhysRevE.91.062134
Indexed BySCI
Funding OrganizationNational Natural Science Foundation of China [11265010, 11375045, 11365015] ; National Natural Science Foundation of China [11265010, 11375045, 11365015] ; National Natural Science Foundation of China [11265010, 11375045, 11365015] ; National Natural Science Foundation of China [11265010, 11375045, 11365015] ; Jiangxi Provincial Natural Science Foundation, China [20132BAB212009] ; Jiangxi Provincial Natural Science Foundation, China [20132BAB212009] ; Jiangxi Provincial Natural Science Foundation, China [20132BAB212009] ; Jiangxi Provincial Natural Science Foundation, China [20132BAB212009]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/20953
CollectionSCI期刊论文
Corresponding AuthorWang, JH (reprint author), Nanchang Univ, Dept Phys, Nanchang 330031, Peoples R China.
Recommended Citation
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,&Wang, 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.
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