Field theory near the critical temperature

Details Field theory near the critical temperature Field theory near the critical temperature

1996-10-14

arxiv.org/abs/hep-ph/9610353v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 3 figures. Talk given at the International School of Subnuclear Physics, 34th Course: Effective Theories and Fundame

Scientific paper

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.

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