Phase transitions in one dimension and less
强关联电子
2007-05-23 v1 统计力学
高能物理 - 理论
摘要
Phase transitions can occur in one-dimensional classical statistical mechanics at non-zero temperature when the number of components N of the spin is infinite. We show how to solve such magnets in one dimension for any N, and how the phase transition develops at N = infinity. We discuss SU(N) and Sp(N) magnets, where the transition is second-order. In the new high-temperature phase, the correlation length is zero. We also show that for the SU(N) magnet on exactly three sites with periodic boundary conditions, the transition becomes first order.
引用
@article{arxiv.cond-mat/0202129,
title = {Phase transitions in one dimension and less},
author = {Paul Fendley and Oleg Tchernyshyov},
journal= {arXiv preprint arXiv:cond-mat/0202129},
year = {2007}
}
备注
16 pages, 1 figure