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题名: Equivalence condition for the canonical and microcanonical ensembles in coupled spin systems
作者: Zhang, Wenxian ;  Sun, C. P. ;  Nori, Franco
刊名: PHYSICAL REVIEW E
出版日期: 2010
卷号: 82, 期号:4, 页码:-
学科分类: Physics
通讯作者: Zhang, WX , Fudan Univ, Key Lab Micro & Nano Photon Struct, Dept Opt Sci & Engn, Shanghai 200433, Peoples R China
部门归属: [Zhang, WX] Fudan Univ, Key Lab Micro & Nano Photon Struct, Dept Opt Sci & Engn, Shanghai 200433, Peoples R China; [Zhang, WX; Sun, CP; Nori, F] RIKEN, Adv Sci Inst, Wako, Saitama 3510198, Japan; [Sun, CP] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; [Nori, F] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
英文摘要: It is typically assumed, without justification, that a weak coupling between a system and a bath is a necessary condition for the equivalence of a canonical ensemble and a microcanonical ensemble. For instance, in a canonical ensemble, temperature emerges if the system and the bath are uncoupled or weakly coupled. We investigate the validity region of this weak-coupling approximation, using a coupled composite-spin system. Our results show that the spin coupling strength can be as large as the level spacing of the system, indicating that the weak-coupling approximation has a much wider region of validity than usually expected.
资助者: National Basic Research Program of China[2009CB929300]; NCET; Doctoral Program of Higher Education of China[20090071120013]; Shanghai Pujiang Program[10PJ1401300]; NSFC[10974209, 10935010]; National 973 program[2006CB921205]; Laboratory of Physical Sciences; National Security Agency; Army Research Office; National Science Foundation[0726909]; DARPA; AFOSR; JSPS-RFBR[09-02-92114]; MEXT Kakenhi on Quantum Cybernetics; Funding Program for Innovative R&D on ST (FIRST)
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000283579900002
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5025
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Zhang, Wenxian,Sun, C. P.,Nori, Franco. Equivalence condition for the canonical and microcanonical ensembles in coupled spin systems[J]. PHYSICAL REVIEW E,2010,82(4):-.
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