Quantum Brayton Refrigeration Cycle with Finite-Size Bose-Einstein Condensates  

作　　者：袁结红 阮慧琳 刘德华 何济洲 王建辉 Jiehong Yuan;Huilin Ruan;Dehua Liu;Jizhou He;Jianhui Wang(Department of Physics,Nanchang University,Nanchang 330031,China;State Key Laboratory of Surface Physics,and Department of Physics,Fudan University,Shanghai 200433,China)

机构地区：[1]Department of Physics,Nanchang University,Nanchang 330031,China [2]State Key Laboratory of Surface Physics,and Department of Physics,Fudan University,Shanghai 200433,China

出　　处：《Chinese Physics Letters》2023年第10期19-23,共5页中国物理快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.11875034);the Major Program of Jiangxi Provincial Natural Science Foundation(Grant No.20224ACB201007);financial support from the Opening Project of Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology。

摘　　要：We consider a quantum Brayton refrigeration cycle consisting of two isobaric and two adiabatic processes,using an ideal Bose gas of finite particles confined in a harmonic trap as its working substance.Quite generally,such a machine falls into three different cases,classified as the condensed region,non-condensed phase,and regime across the critical point.When the refrigerator works near the critical region,both figure of merit and cooling load are significantly improved due to the singular behavior of the specific heat,and the coefficient of performance at maximum figure of merit is much larger than the Curzon-Ahlborn value.With the machine in the non-condensed regime,the coefficient of performance for maximum figure of merit agrees well with the Curzon-Ahlborn value.

关 键 词：VALUE condensed CRITICAL 

分 类 号：O17[理学—数学]