13 citations · 31 across the 10 of their papers we have counts for
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XYZ integrability the easy way
Paul Fendley, Sascha Gehrmann, Eric Vernier +1
Sutherland showed that the XYZ quantum spin-chain Hamiltonian commutes with the eight-vertex model transfer matrix, so that Baxter's subsequent tour de force proves the integrabili…
Exact strong zero modes in quantum circuits and spin chains with non-diagonal boundary conditions
Sascha Gehrmann, Fabian H. L. Essler
We construct exact strong zero mode operators (ESZM) in integrable quantum circuits and the spin-1/2 XXZ chain for general open boundary conditions, which break the bulk U(1) symme…
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…
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…