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题名: EFFECTIVE MEAN-FIELD THEORY-BASED ON CUMULANT EXPANSION - A NEW APPROACH METHOD ORDER BY ORDER
作者: AN, Y ;  SONG, YX
刊名: COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期: 1995
卷号: 24, 期号:2, 页码:233-238
关键词: LATTICE
学科分类: Physics
通讯作者: AN, Y , ACAD SINICA,INST THEORET PHYS,POB 2735,BEIJING 100080,PEOPLES R CHINA.
部门归属: SICHUAN UNIV,DEPT PHYS,CHENGDU 610064,PEOPLES R CHINA
英文摘要: We propose in this paper an effective mean-field theory, which makes the calculation for any observable being performed in a general form of cumulant expansion. The effective mean-field equation with reasonable physical annotation, which is obtained from the lower bound extreme value condition of free energy, can be applied to general statistic mechanics and Lagrangian quantum theory. By applying it to lattices, our theory, for various models containing nonuniform system and nonequilibrium phenomenon, can give a realistic scheme to study the nonperturbative effect order by order. As a testing example to two-dimensional sing model, we obtain a result approaching the Onsager solution order by order.
收录类别: SCI
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/11708
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:
AN, Y,SONG, YX. EFFECTIVE MEAN-FIELD THEORY-BASED ON CUMULANT EXPANSION - A NEW APPROACH METHOD ORDER BY ORDER[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,1995,24(2):233-238.
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