A new integrable two parameter model of strongly correlated electrons in one dimension

TL;DR

This paper introduces a novel exactly solvable one-dimensional fermion model with two interaction parameters, revealing superconducting properties through correlation calculations.

Contribution

It formulates and solves a new integrable model combining Hubbard, correlated hopping, and pair hopping interactions in one dimension.

Findings

Model exhibits superconducting correlations in specific regimes.

Exact Bethe ansatz solution provided for the new model.

Contains multiple interaction terms enhancing physical realism.

Abstract

A new one-dimensional fermion model depending on two independent interaction parameters is formulated and solved exactly by the Bethe ansatz method. The Hamiltonian of the model contains the Hubbard interaction and correlated hopping as well as pair hopping terms. The density-density and pair correlations are calculated which manifest superconducting properties in certain regimes of the phase diagram.