Nonuniversal finite-size scaling in anisotropic systems

Speaker : 陈晓松 研究员 中国科学院理论物理研究所
Date : 2004-05-19 15:30
Venue : Conference Hall 322, ITP/理论物理所322报告厅
Abstract : We study the bulk and finite-size critical behavior of the O(n) symmetric phi^4 theory with spatially anisotropic interactions of non-cubic symmetry in d<4 dimensions. In such systems of a given (d,n) universality class, two-scale factor universality is absent in bulk correlation functions, and finite-size scaling functions including the Privman-Fisher scaling form of the free energy, the Binder cumulant ratio and the Casimir amplitude are shown to be nonuniversal.