Extended integrability regime for the supersymmetric U model

Abstract

An extension of the supersymmetric U model for correlated elctrons is given and integrability is established by demonstrating that the model can be constructed through the Quantum Inverse Scattering Method using an R-matrix without the difference property. Some general symmetry properties of the model are discussed and from the Bethe ansatz solution an expression for the energies is presented.

7 pages. LaTeX, no figures, minor typos corrected

References in corpus (3)

• The Quantum Inverse Scattering Method for Hubbard-like Models
• Integrability of a t-J model with impurities
• Integrable multiparametric quantum spin chains

Cited by in corpus (4)

• New R-matrices with non-additive spectral parameters and integrable models of strongly correlated fermions
• Transfer matrix eigenvalues of the anisotropic multiparametric U model
• Multi-parametric R-matrix for the sl(2|1) Yangian
• A construction for R-matrices without difference property in the spectral parameter