%0 Journal Article
%T Numerical evidence for Goldstone-mode effects in the three-dimensional O(4)-model
%A Juergen Engels
%A Tereza Mendes
%J Physics
%D 1999
%I arXiv
%R 10.1016/S0920-5632(00)91780-8
%X We investigate the three-dimensional O(4)-model on 24^3--96^3 lattices as a function of the magnetic field H. Below the critical point, in the broken phase, we confirm explicitly the H^{1/2} dependence of the magnetization and the corresponding H^{-1/2} divergence of the longitudinal susceptibility, which are predicted from the existence of Goldstone modes. At the critical point the magnetization follows the expected finite-size-scaling behavior, with critical exponent delta = 4.87(1).
%U http://arxiv.org/abs/hep-lat/9909013v2