Tensor renormalization of three-dimensional Potts model

Abstract

We study the $q$-state Potts models on a cubic lattice in the thermodynamic limit using tensor renormalization group transformations with the triad approximation. By computing the thermodynamic potentials, we locate the first-order phase transitions for $10<q\le 20$ which has not been explored using any method. We also examine the efficiency of the triad approximation method in obtaining the fixed-point tensor and comment on how this can be improved.

v1: Data table, 8 figures, 1+16 pages, 1 Jupyter notebook, and up to 20 states