Kosterlitz-Thouless Phase Transition In The Two Dimensional Linear Sigma Model
高能物理 - 唯象学
2009-10-28 v1 凝聚态物理
高能物理 - 理论
摘要
We investigate the O(N) symmetric linear -model in two dimensions by means of an exact nonperturbative evolution equation. The perturbative infrared divergences are absent in this formulation. We use a simple approximative solution of the flow equation which corresponds to a derivative expansion for the effective action. For N=2 this gives a good picture of the Kosterlitz-Thouless phase transition.
引用
@article{arxiv.hep-ph/9409459,
title = {Kosterlitz-Thouless Phase Transition In The Two Dimensional Linear Sigma Model},
author = {M. Gr"ater and C. Wetterich},
journal= {arXiv preprint arXiv:hep-ph/9409459},
year = {2009}
}
备注
10 pages + 4 eps-figures, LaTeX