On the thermodynamics of strongly correlated integrable electron systems

TL;DR

This paper revisits the thermodynamic Bethe ansatz for strongly correlated electron models, revealing additional terms that could significantly impact the understanding of their physical properties.

Contribution

It identifies extra terms in the thermodynamic equations of key electron models, offering potential new insights into their thermodynamics.

Findings

Additional terms in the Bethe ansatz equations identified

Potential implications for the physics of correlated electron systems

Enhanced understanding of thermodynamics in integrable models

Abstract

We reexamine the Yang-Yang-Takahashi method of deriving the thermodynamic Bethe ansatz equations which describe strongly correlated electron systems of fundamental physical interest, such as the Hubbard, $s-d$ exchange (Kondo) and Anderson models. It is shown that these equations contain some additional terms which may play an important role in the physics of the systems.