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题名: Distribution of equilibrium free energies in a thermodynamic system with broken ergodicity
作者: Zhou Hai-Jun ;  Li Kang
刊名: COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期: 2008
卷号: 49, 期号:3, 页码:659-664
关键词: SPIN-GLASSES ;  TEMPERATURE ;  TRANSITION ;  DYNAMICS ;  MODELS
学科分类: Physics
通讯作者: Zhou, HJ , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
部门归属: [Zhou, HJ; Li, K] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: At low temperature,,; the configurational phase space of a macroscopic complex system (e-g., a spin-glass) of N similar to 10(23) interacting particles may split into an exponential number Omega(s) similar to exp(const x N) of ergodic sub-spaces (thermodynamic states). It is usually assumed that the equilibrium collective behavior of such a system is determined by its ground thermodynamic states of the minimal free-energy density, and that the equilibrium free energies follow the distribution of exponential decay. But actually for some complex systems, the equilibrium free-energy values may follow a Gaussian distribution within an intermediate temperature range, and consequently their equilibrium properties are contributed by excited thermodynamic states. Based on this analysis, the re-weighting parameter y in the cavity approach of spin-glasses is easily understood. Depending on the free-energy distribution, the optimal y can either be equal to or be strictly less than the inverse temperature beta.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000254252700030
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5558
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:
Zhou Hai-Jun,Li Kang. Distribution of equilibrium free energies in a thermodynamic system with broken ergodicity[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2008,49(3):659-664.
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