Nonequilibrium Reweighting on the Driven Diffusive Lattice Gas

TL;DR

This paper applies a novel nonequilibrium reweighting technique, enhanced by multi-spin coding, to study the driven diffusive lattice gas, enabling efficient estimation of critical parameters and derivatives of thermodynamic quantities.

Contribution

It introduces an improved nonequilibrium reweighting method that allows direct calculation of derivatives and applies it to a driven lattice gas model.

Findings

Estimated critical temperature Tc

Determined dynamical exponent z

Enabled direct calculation of thermodynamic derivatives

Abstract

The nonequilibrium reweighting technique, which was recently developed by the present authors, is used for the study of the nonequilibrium steady states. The renewed formulation of the nonequlibrium reweighting enables us to use the very efficient multi-spin coding. We apply the nonequilibrium reweighting to the driven diffusive lattice gas model. Combining with the dynamical finite-size scaling theory, we estimate the critical temperature Tc and the dynamical exponent z. We also argue that this technique has an interesting feature that enables explicit calculation of derivatives of thermodynamic quantities without resorting to numerical differences.