Equation of state and coarse grained free energy for matrix models
J. Berges, C. Wetterich
Abstract
We investigate phase transitions in three dimensional scalar matrix models, with special emphasis on complex 2 × 2 matrices. The universal equation of state for weak first order phase transitions is computed. We also study the coarse grained free energy. Its dependence on the coarse graining scale gives a quantitative criterion for the validity of the standard treatment of bubble nucleation.
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