Viability of competing field theories for the driven lattice gas

TL;DR

This paper critically evaluates a new field theory proposed for the driven lattice gas, demonstrating it fails to capture key microscopic features and re-analyzing its critical exponents as incorrect.

Contribution

It provides a comprehensive review of the original and new field theories, showing the new one is not a viable description for the driven lattice gas.

Findings

The new field theory does not reproduce key microscopic features.

Re-analysis shows the critical exponents claimed are incorrect.

The original field theory remains more consistent with microscopics.

Abstract

It has recently been suggested that the driven lattice gas should be described by a novel field theory in the limit of infinite drive. We review the original and the new field theory, invoking several well-documented key features of the microscopics. Since the new field theory fails to reproduce these characteristics, we argue that it cannot serve as a viable description of the driven lattice gas. Recent results, for the critical exponents associated with this theory, are re-analyzed and shown to be incorrect.