The continuum limit of the integrable open XYZ spin-1/2 chain

TL;DR

This paper demonstrates that taking the continuum limit of the integrable open XYZ spin-1/2 chain results in the boundary sine-Gordon theory, establishing a connection between lattice models and field theories.

Contribution

It provides a novel derivation of the boundary sine-Gordon theory from the lattice XYZ spin chain using perturbation methods.

Findings

Continuum limit yields boundary sine-Gordon theory

Perturbation method effectively connects lattice and field models

Supports integrability preservation in the continuum transition

Abstract

We show that the continuum limit of the integrable XYZ spin-1/2 chain on a half-line gives rise to the boundary sine-Gordon theory using the perturbation method.