104 citations · 1.8k across the 73 of their papers we have counts for
73 papers
quantum chains with quantum group invariant boundaries
Holger Frahm, Márcio J. martins
Based on the finite-size analysis of the spectrum of the quantum group invariant deformation of the superspin chain we identify the operator content of the conformal fie…
Factorization of density matrices in the critical RSOS models
Daniel Westerfeld, Maxime Großpietsch, Hannes Kakuschke +1
We study reduced density matrices of the integrable critical RSOS model in a particular topological sector containing the ground state. Similar as in the spin- Heisenberg mode…
Integrable boundary conditions for staggered vertex models
Holger Frahm, Sascha Gehrmann
Yang-Baxter integrable vertex models with a generic -staggering can be expressed in terms of composite -matrices given in terms of the elementary -matr…
quantum chains with free boundaries
Holger Frahm, Márcio J. Martins
In this paper we investigate the spectrum of quantum spin chains with free boundary conditions. We compute the surface free energy of these models which, similar to oth…
Finite size spectrum of the staggered six-vertex model with -invariant boundary conditions
Holger Frahm, Sascha Gehrmann
The finite size spectrum of the critical -staggered spin- XXZ model with quantum group invariant boundary conditions is studied. For a particular (self-dual) cho…
Density matrices in integrable face models
Holger Frahm, Daniel Westerfeld
Using the properties of the local Boltzmann weights of integrable interaction-round-a-face (IRF or face) models we express local operators in terms of generalized transfer matrices…