Numerical Latent Heat Observation of the q=5 Potts Model

TL;DR

This paper numerically investigates the latent heat of the q=5 Potts model at the first-order transition, confirming the latent heat value aligns with the exact solution using the CTMRG method.

Contribution

It provides a numerical calculation of latent heat in the q=5 Potts model, demonstrating the effectiveness of the CTMRG method for first-order phase transitions.

Findings

Latent heat L = 0.027 matches the exact solution.

Disordered and ordered phase energies differ significantly.

CTMRG accurately captures first-order transition properties.

Abstract

Site energy of the five-state ferromagnetic Potts model is numerically calculated at the first-order transition temperature using corner transfer matrix renormalization group (CTMRG) method. The calculated energy of the disordered phase $U^{+}$ is clearly different from that of the ordered phase $U^{-}$. The obtained latent heat $L = U^{-} - U^{+}$ is 0.027, which quantitatively agrees with the exact solution.