计算物理 ›› 1998, Vol. 15 ›› Issue (4): 435-438.

• 论文 • 上一篇    下一篇

最短轨道凝聚模型的相变

龙超云1, 李后强2, 罗文锋2, 朱治军3   

  1. 1. 贵州大学物理系, 贵阳 550025;
    2. 四川大学物理系, 成都 610064;
    3. 美国休斯顿大学物理系
  • 收稿日期:1997-05-26 修回日期:1998-04-27 出版日期:1998-07-25 发布日期:1998-07-25
  • 作者简介:龙超云,男,34,讲师,理学硕士,贵州大学物理系
  • 基金资助:
    国家自然科学基金资助项目

PHASE TRANSITION OF THE SHORTEST-PATH AGGREGATION

Long Chaoyun1, Li Houqiang2, Luo Wenfeng2, Zhu Zhijun3   

  1. 1. Department of physics, Guizhou University, Guiyang 550025;
    2. Department of physics, Sichuan University, Chengdu 610064;
    3. Department of physics, Houston University, Houston, USA
  • Received:1997-05-26 Revised:1998-04-27 Online:1998-07-25 Published:1998-07-25

摘要: 应用重整化群计算最短轨道模型的生长几率分布{Pα,i}及其构型权重Cα(2×2原胞和3×3原胞),从而得出多分形热力学的配分函数Z(q,L),自由能F(q,L),能量E(q,L),比热c(q,L)和广义维数Dq,结果表明该模型在q=qc≈0处发生相变,即当q < qc时,生长几率分布{Pα,i}不具有多分形性质。

关键词: 分形, 重整化群, 相变

Abstract: The growth probabilities {Pα,i} and configuration weights Cα (for 2×2 cell and 3×3 cell) are obtained by using the renormalization-group method. The "partition function" Z(q,L), "Free energy" F(q,L),"energy" E(q,L),"specific heat" c(q,L) and hierarchical dimensions Dq are calculated. The evidence has been found for suggesting the existence of phase transition in the multifractal spectrum of the SPA model and position of critical point qc=0. In the words, the distribution of growth probability has no multifractal features.

Key words: fractal, renormalization-group, phase transition

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