Knowledge Management System of Institute of Theoretical Physics, CAS
| 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 Publication | PHYSICAL REVIEW E
 |
| Language | 英语 |
| Abstract | 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. |
| 2015 | |
| Volume | 91Issue:6Pages:62134 |
| Subject Area | Physics |
| DOI | http://dx.doi.org/10.1103/PhysRevE.91.062134 |
| Indexed By | SCI |
| Funding Organization | 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] ; 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] |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/20953 |
| Collection | SCI期刊论文 |
| Corresponding Author | Wang, 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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Efficiency at maximu（321KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | Application Full Text | |
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