Novel universality classes of coupled driven diffusive systems

TL;DR

This paper explores new universality classes in coupled driven diffusive systems, showing how cross-correlations influence scaling behaviors and amplitude ratios, with implications for experimental systems.

Contribution

It introduces novel universality classes where cross-correlations cause continuous variation in critical exponents and amplitude ratios in coupled driven diffusive systems.

Findings

Cross-correlations lead to continuously varying scaling exponents.

Amplitude ratios depend on the strength of cross-correlations.

Results have implications for real-world experimental systems.

Abstract

Motivated by the phenomenologies of dynamic roughening of strings in random media and magnetohydrodynamics, we examine the universal properties of driven diffusive system with coupled fields. We demonstrate that cross-correlations between the fields lead to amplitude-ratios and scaling exponents varying continuosly with the strength of these cross-correlations. The implications of these results for experimentally relevant systems are discussed.