Path-Integral Approach to Scale Anomaly at Finite Temperature

We derive the relativistic thermodynamic scale equation using imaginary-time path integrals, with complex scalar field theory taken as a concrete example. We use Fujikawa's method to derive the scaling anomaly for this system using a matrix regulator. We make a general scaling argument to show how for anomalous systems, the $β$ function of the vacuum theory can be derived from measurement of macroscopic thermodynamic parameters.

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