Flow of the Coarse Grained Free Energy for Crossover Phenomena

Abstract

The critical behaviour of a system of two coupled scalar fields in three dimensions is studied within the formalism of the effective average action. The fixed points of the system are identified and the crossover between them is described in detail. Besides the universal critical behaviour, the flow of the coarse grained free energy also describes the approach to scaling.

18 pages, latex, 4 figures appended as uuencoded file

References in corpus (9)

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Cited by in corpus (3)

• Non-Perturbative Renormalization Flow in Quantum Field Theory and Statistical Physics
• The nonperturbative functional renormalization group and its applications
• Grand unification and the Planck scale: An $SO(10)$ example of radiative symmetry breaking