Solving topological defects via fusion

Details Solving topological defects via fusion Solving topological defects via fusion

2007-12-27

arxiv.org/abs/0712.4292v1

Nucl.Phys.B802:307-329,2008

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX, 24 pages, 34 eps figures

Scientific paper

10.1016/j.nuclphysb.2008.04.003

Integrable defects in two-dimensional integrable models are purely transmitting thus topological. By fusing them to integrable boundaries new integrable boundary conditions can be generated, and, from the comparison of the two solved boundary theories, explicit solutions of defect models can be extracted. This idea is used to determine the transmission factors and defect energies of topological defects in sinh-Gordon and Lee-Yang models. The transmission factors are checked in Lagrangian perturbation theory in the sinh-Gordon case, while the defect energies are checked against defect thermodynamic Bethe ansatz equations derived to describe the ground-state energy of diagonal defect systems on a cylinder. Defect bootstrap equations are also analyzed and are closed by determining the spectrum of defect bound-states in the Lee-Yang model.

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