The constraint effective potential of the staggered magnetization in an antiferromagnet

U. Gerber, C. P. Hofmann, F. J. Jiang, M. Nyfeler, U. J. Wiese

研究成果: 雜誌貢獻文章

26 引文 斯高帕斯(Scopus)

摘要

We employ an improved estimator to calculate the constraint effective potential of the staggered magnetization in the spin quantum Heisenberg model using a loop-cluster algorithm. The first and second moment of the probability distribution of the staggered magnetization are in excellent agreement with the predictions from the systematic low-energy magnon effective field theory. We also compare the Monte Carlo data with the universal shape of the constraint effective potential of the staggered magnetization and study its approach to the convex effective potential in the infinite volume limit. In this way the higher-order low-energy parameter k0 is determined from a fit to the numerical data.

原文英語
文章編號P03021
期刊Journal of Statistical Mechanics: Theory and Experiment
2009
發行號3
DOIs
出版狀態已發佈 - 2009 五月 6

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Statistics, Probability and Uncertainty

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