Breached pair superfluidity: a brief review

TL;DR

This paper reviews the concept of breached pair superfluidity, a generalized form of interior gap superfluidity, highlighting its development, key features, and stability considerations within the context of condensed matter physics.

Contribution

It provides a concise overview of the development and main aspects of breached pair superfluidity, emphasizing its theoretical foundation and stability conditions.

Findings

Introduction of breached pair superfluidity as a broader concept

Discussion on the stability conditions of the phase

Historical context and development with Frank Wilczek

Abstract

Interior gap superfluidity was introduced together with Frank Wilczek. Later on together with our collaborators, we generalized this new possibility of superfluidity to a broader concept, breach pair superfluidity. In the occasion to celebrate Professor Frank Wilczek's seventieth birthday and his productive career in several major areas in physics, I dedicate this note to recall the exciting times of developing this idea, the main aspects of the proposed phase, and the discussion on its stability condition.