用变分累积展开法计算二维Ising模型八阶临界温度  

CALCULATION OF THE CRITICAL TEMPERATURE BY 2-DIMENSIONAL ISING MODEL WITH VARIATIONALCUMULANT EXPANSION TO THE EIGHTH ORDER

作　　者：区镜添[1] 周宗文[1] 

机构地区：[1]南开大学物理系

出　　处：《南开大学学报（自然科学版）》1995年第1期98-101,共4页Acta Scientiarum Naturalium Universitatis Nankaiensis

摘　　要：本文用变分累积展开对Ｉｓｉｎｇ模型的临界温度的计算提出一种直观的图示解法，使计算大为简化。应用此法求得各阶临界温度与其他文献推算结果相一致。本文利用此法计算二维Ｉｓｉｎｇ模型八阶临界温度Ｔｃ（８）＝２．４７６７１，此法也可以推广到三维的情形．An audio-visual graphical method of the variational-Cumulant expansion (VCE) for calculation the critical temperature is sugested using this method, the results of critical temperature in each order are in agreement with other article's. In this paper .the model is evaluated to 8th order. Tc(8) = 2. 47671 (J/K) . This method is also valid for 3-dimensional case.

关 键 词：变分累积展开 伊辛模型 临界温度 

分 类 号：O551.2[理学—热学与物质分子运动论]