An alternative Lagrangian definition of an integrable defect is provided and analysed. The
new approach is sufficiently broad to allow a description of defects within the Tzitzéica …

We define the sigma-model action for world-sheets with embedded defect networks in the
presence of a three-form field strength. We derive the defect gluing condition for the sigma …

A bstract In this paper we return to the question of the modular properties of a generalised
Gibbs ensemble of a single free fermion. We extend our previous proposals to a GGE …

A bstract Application of our algebraic approach to Liouville integrable defects is proposed for
the sine-Gordon model. Integrability of the model is ensured by the underlying classical r …

A bstract Topological defects have long been known to encode symmetries and dualities
between physical systems. In the context of string theory, defects have been intensively …

Within the quantum sine-Gordon model a transmission matrix describing the scattering of a
soliton with a fused pair of integrable defects is proposed. The result is consistent with the …

A bstract A new integrable boundary for the classical nonlinear Schrödinger model is
derived by dressing a boundary with a defect. A complete investigation of the integrability of …

The classical sine–Gordon model is a two-dimensional integrable field theory, with particle-
like solutions—the so-called solitons. Using its integrability one can define the quantum …

A simple, basic argument is given, based solely on energy–momentum considerations, to
recover conditions under which ar affine or conformal Toda field theories can support …

Starting with a discussion of the general applicability of the simplified mirror thermodynamic
Bethe ansatz (TBA) equations to simple deformations of the AdS 5× S 5 superstring, we …