Browsing by Subject "Bethe Ansatz"

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Finite size spectrum of the staggered six-vertex model with Uq(sl (2))-invariant boundary conditions

Frahm, Holger; Gehrmann, Sascha (Berlin, Heidelberg : Springer, 2022)

The finite size spectrum of the critical ℤ2-staggered spin-1/2 XXZ model with quantum group invariant boundary conditions is studied. For a particular (self-dual) choice of the staggering the spectrum of conformal weights ...
Integrable boundary conditions for staggered vertex models

Frahm, Holger; Gehrmann, Sascha (Bristol : IOP Publ., 2023)

Yang-Baxter integrable vertex models with a generic Z 2 -staggering can be expressed in terms of composite R -matrices given in terms of the elementary R-matrices. Similarly, integrable open boundary conditions can be ...

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