1996/10/14 by J. Berges, Berges, J.
Physics and Astronomy · #Condensed Matter (cond-mat) #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #cond-mat #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9610353
11 pages, 3 figures. Talk given at the International School of Subnuclear Physics, 34th Course: Effective Theories and Fundamental Interactions, Erice-Sicily, 3-12 July 1996
arxiv created 1996/10/14 · arxiv updated 2009/11/30
Field theory at nonvanishing temperature beyond perturbation theory is discussed for the N-component O(N)-symmetric scalar theory. We compute the effective potential directly in three dimensions using an exact evolution equation for an effective action with an infrared cutoff. A suitable truncation is solved numerically. We obtain a detailed quantitative picture of the scaling form of the equation of state in the vicinity of the critical temperature of a second order phase transition.