The dynamic exponent of the Ising model on negatively curved surfaces

TL;DR

This study explores how the dynamic critical exponent of the 2D Ising model changes when defined on negatively curved surfaces, revealing mean field behavior due to the infinite-dimensional nature of such lattices.

Contribution

It demonstrates that the Ising model on negatively curved surfaces exhibits mean field critical exponents, differing from the planar case, and confirms this through short-time relaxation and Monte Carlo simulations.

Findings

Dynamic exponent differs from planar Ising model

Static correlation length exponent matches mean field theory

Negatively curved surfaces induce infinite-dimensional behavior

Abstract

We investigate the dynamic critical exponent of the two-dimensional Ising model defined on a curved surface with constant negative curvature. By using the short-time relaxation method, we find a quantitative alteration of the dynamic exponent from the known value for the planar Ising model. This phenomenon is attributed to the fact that the Ising lattices embedded on negatively curved surfaces act as ones in infinite dimensions, thus yielding the dynamic exponent deduced from mean field theory. We further demonstrate that the static critical exponent for the correlation length exhibits the mean field exponent, which agrees with the existing results obtained from canonical Monte Carlo simulations.