84 citations · 622 across the 37 of their papers we have counts for
10 papers · 1 filter
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…
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…
Exact solution and finite size properties of the vertex model
W. Galleas, M. J. Martins
We have diagonalized the transfer matrix of the vertex model by means of the algebraic Bethe ansatz method for a variety of grading possibilities. This allowed u…
Algebraic Bethe ansatz approach for the one-dimensional Hubbard model
P. B. Ramos, M. J. Martins
We formulate in terms of the quantum inverse scattering method the algebraic Bethe ansatz solution of the one-dimensional Hubbard model. The method developed is based on a new set…
One parameter family of an integrable vertex model : Algebraic Bethe ansatz approach and ground state structure
P. B. Ramos, M. J. Martins
We formulate in terms of the quantum inverse scattering method the exact solution of a invariant vertex model recently introduced in the literature. The corresponding tr…
Bethe ansatz solution of the invariant spin chain
M. J. Martins
We have applied the analytical Bethe ansatz approach in order to solve the invariant magnet. By using the Bethe ansatz equations we have calculated the ground state ene…