Universal amplitude ratios in the two-dimensional Ising model

TL;DR

This paper employs integrable field theory to precisely calculate universal amplitude ratios in the 2D Ising model, including those at nonzero magnetic field, providing exact values for these fundamental quantities.

Contribution

It introduces exact calculations of universal amplitude ratios in the 2D Ising model using integrable field theory, especially at nonzero magnetic field.

Findings

Exact values of amplitude ratios involving nonzero magnetic field.

Universal amplitude ratios computed precisely.

Application of integrable field theory to statistical models.

Abstract

We use the results of integrable field theory to determine the universal amplitude ratios in the two-dimensional Ising model. In particular, the exact values of the ratios involving amplitudes computed at nonzero magnetic field are provided.