Affiliation:
1. Trinity College Dublin
2. Eötvös Loránd University
Abstract
In this paper we present a new integrable deformation of the Hubbard model. Our deformation gives rise to a range 3 interaction term in the Hamiltonian which does not preserve spin or particle number. This is the first non-trivial medium range deformation of the Hubbard model that is integrable. Our model can be mapped to a new integrable nearest-neighbour model via a duality transformation. The resulting nearest-neighbour model also breaks spin conservation. We compute the RR-matrices for our models, and find that there is a very unusual dependence on the spectral parameters in terms of the elliptic amplitude.
Funder
Engineering and Physical Sciences Research Council
National Science Foundation
Royal Society
Subject
General Physics and Astronomy