High Order Variational-Cumulant Expansion for the 2- and
3-Dimensional Ising Model

Chin. Phys. Lett.

1994, Vol. 11

Issue (4): 197-199 DOI:

Original Articles

High Order Variational-Cumulant Expansion for the 2- and 3-Dimensional Ising Model

LIU Ruijie;CHEN Tianlun

Department of Physics, Nankai University, Tianjin 300071

Cite this article:

LIU Ruijie, CHEN Tianlun 1994 Chin. Phys. Lett. 11 197-199

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Abstract The variational-cumulant expansion method is applied to the 2- and 3-dimensional Ising model on the simple quadratic and cubic lattice. The model is evaluated to the seventh order. The critical temperature is given, and curves of the internal energy and specific heat are displayed for 3-dimensional case.

Keywords: 05.50.+q 65.70.+Y 75.10.Hk

Published: 01 April 1994

PACS:	05.50.+q	(Lattice theory and statistics)
	65.70.+Y
	75.10.Hk	(Classical spin models)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1994/V11/I4/0197

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