The phase diagram of the massive Gross-Neveu model, revisited

TL;DR

This paper revisits the phase diagram of the massive Gross-Neveu model, revealing a kink-antikink crystal phase at finite temperature and chemical potential, with implications for condensed matter physics.

Contribution

It uncovers a previously missed kink-antikink crystal phase in the phase diagram of the model at finite temperature and chemical potential.

Findings

Identification of a kink-antikink crystal phase

Generalization of bipolaron lattice to finite temperature

Solution of the model in the large N limit

Abstract

The massive Gross-Neveu model is solved in the large N limit at finite temperature and chemical potential. The phase diagram features a kink-antikink crystal phase which was missed in previous works. Translated into the framework of condensed matter physics our results generalize the bipolaron lattice in non-degenerate conducting polymers to finite temperature.