title: Four-level refrigerator driven by photons.
abstract: We propose a quantum absorption refrigerator driven by photons. The model uses a four-level system as its working substance and couples simultaneously to hot, cold, and solar heat reservoirs. Explicit expressions for the cooling power Q̇(c) and coefficient of performance (COP) η(COP) are derived, with the purpose of revealing and optimizing the performance of the device. Our model runs most efficiently under the tight coupling condition, and it is consistent with the third law of thermodynamics in the limit T→0.
authors.affiliation: Department of Physics, Nanchang University, Nanchang 330031, China.|State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China.|State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.
authors.forename: Jianhui
authors.initials: J
authors.lastname: Wang
authors.affiliation: Department of Physics, Nanchang University, Nanchang 330031, China.
authors.forename: Yiming
authors.initials: Y
authors.lastname: Lai
authors.affiliation: Department of Physics, Nanchang University, Nanchang 330031, China.
authors.forename: Zhuolin
authors.initials: Z
authors.lastname: Ye
authors.affiliation: Department of Physics, Nanchang University, Nanchang 330031, China.
authors.forename: Jizhou
authors.initials: J
authors.lastname: He
authors.affiliation: State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.
authors.forename: Yongli
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Department of Electronic Information Engineering, Nanchang University, Nanchang 330031, China.
authors.forename: Qinghong
authors.initials: Q
authors.lastname: Liao