Purely Transmitting Defect Field Theories

TL;DR

This paper introduces a new class of integrable defect theories that are purely transmitting, formulated as chiral perturbations of conformal field theories, with detailed examples including sine-Gordon and Ising models.

Contribution

It defines an infinite class of purely transmitting defect theories as chiral perturbations of conformal field theories, expanding the understanding of integrable defect models.

Findings

Theories can be interacting in the bulk and still be purely transmitting.

Explicit examples include sine-Gordon and Ising models.

The framework allows for detailed analysis of defect properties.

Abstract

We define an infinite class of integrable theories with a defect which are formulated as chiral defect perturbations of a conformal field theory. Such theories can be interacting in the bulk, and are purely transmitting through the defect. The examples of the sine-Gordon theory and Ising model are worked out in some detail.