2000•Unpublished venueOpen access

Universal ratios of the renormalization group

Giuseppe Mussardo

Abstract

The scaling form of the free-energy near a critical point allows for the definition of various universal ratios of thermodynamical amplitudes.Together with the critical exponents they characterize the universality classes and may be useful experimental quantities.We show how these universal quantities can be computed for a particular class of universality by using several Quantum Field Theory methods

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Key concepts: Renormalization group, Universality (dynamical systems), Scaling, Critical exponent, Physics, Amplitude, Critical point (mathematics), Statistical physics