Integrable coupling in a model for Josephson tunneling between non-identical BCS systems

TL;DR

This paper extends an integrable model for Josephson tunneling to non-identical BCS systems, providing an exact solution via Bethe ansatz, which enhances understanding of tunneling phenomena in asymmetric superconductors.

Contribution

It introduces a generalized integrable model for Josephson tunneling between non-identical BCS systems and derives its exact solution using Bethe ansatz.

Findings

Exact solution for the generalized model obtained

Extension from identical to non-identical BCS systems

Potential applications in superconductivity research

Abstract

We extend a recent construction for an integrable model describing Josephson tunneling between identical BCS systems to the case where the BCS systems have different single particle energy levels. The exact solution of the generalized model is obtained through the Bethe ansatz.