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Quantum Maxwell
Dong, H; Xu, DZ; Cai, CY; Sun, CP; Dong, H (reprint author), Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China.
2011
发表期刊PHYSICAL REVIEW E
ISSN1539-3755
卷号83期号:6页码:61108
摘要We study the physical mechanism of Maxwell's demon (MD), which helps do extra work in thermodynamic cycles with the heat engine. This is exemplified with one molecule confined in an infinitely deep square potential with a movable solid wall. The MD is modeled as a two-level system (TLS) for measuring and controlling the motion of the molecule. The processes in the cycle are described in a quantum fashion. It is discovered that a MD with quantum coherence or one at a temperature lower than the molecule's heat bath can enhance the ability of the whole working substance, formed by the heat engine plus the MD, to do work outside. This observation reveals that the essential role of the MD is to drive the whole working substance off equilibrium, or equivalently, to work between two heat baths with different effective temperatures. The elaborate studies with this model explicitly reveal the effect of finite size off the classical limit or thermodynamic limit, which contradicts common sense on a Szilard heat engine (SHE). The quantum SHE's efficiency is evaluated in detail to prove the validity of the second law of thermodynamics.
部门归属[Dong, H.; Xu, D. Z.; Cai, C. Y.; Sun, C. P.] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
关键词Free-energy Differences 2nd Law Engines
学科领域Physics
资助者NSFC [10974209, 10935010]; National 973 Program [2006CB921205] ; NSFC [10974209, 10935010]; National 973 Program [2006CB921205] ; NSFC [10974209, 10935010]; National 973 Program [2006CB921205] ; NSFC [10974209, 10935010]; National 973 Program [2006CB921205] ; NSFC [10974209, 10935010]; National 973 Program [2006CB921205] ; NSFC [10974209, 10935010]; National 973 Program [2006CB921205] ; NSFC [10974209, 10935010]; National 973 Program [2006CB921205] ; NSFC [10974209, 10935010]; National 973 Program [2006CB921205]
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收录类别SCI
语种英语
资助者NSFC [10974209, 10935010]; National 973 Program [2006CB921205] ; NSFC [10974209, 10935010]; National 973 Program [2006CB921205] ; NSFC [10974209, 10935010]; National 973 Program [2006CB921205] ; NSFC [10974209, 10935010]; National 973 Program [2006CB921205] ; NSFC [10974209, 10935010]; National 973 Program [2006CB921205] ; NSFC [10974209, 10935010]; National 973 Program [2006CB921205] ; NSFC [10974209, 10935010]; National 973 Program [2006CB921205] ; NSFC [10974209, 10935010]; National 973 Program [2006CB921205]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/14339
专题理论物理所SCI论文
通讯作者Dong, H (reprint author), Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China.
推荐引用方式
GB/T 7714
Dong, H,Xu, DZ,Cai, CY,et al. Quantum Maxwell[J]. PHYSICAL REVIEW E,2011,83(6):61108.
APA Dong, H,Xu, DZ,Cai, CY,Sun, CP,&Dong, H .(2011).Quantum Maxwell.PHYSICAL REVIEW E,83(6),61108.
MLA Dong, H,et al."Quantum Maxwell".PHYSICAL REVIEW E 83.6(2011):61108.
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