How to calculate correlation functions of Heisenberg chains

TL;DR

This paper presents a new method for accurately calculating dynamical spin-spin correlation functions in finite Heisenberg chains, applicable to both isotropic and anisotropic models across all parameters.

Contribution

The authors introduce a novel computational approach that enhances the precision of correlation function calculations in Heisenberg models.

Findings

High-accuracy results across full parameter space

Applicable to both isotropic and anisotropic models

Effective for finite chains

Abstract

We describe a method for calculating dynamical spin-spin correlation functions in the finite isotropic and anisotropic antiferromagnetic Heisenberg models. Our method is able to produce results with high accuracy over the full parameter space.