Fragmentation of Bose-Einstein Condensates

TL;DR

This paper develops a unified theoretical framework for bosonic systems with multiple condensates, exploring how degeneracies and interactions lead to various fragmentation phenomena and strongly correlated states without condensation.

Contribution

It introduces a comprehensive theory unifying models of bosonic condensates and analyzes how degeneracies and symmetries cause fragmentation and complex correlated states.

Findings

Multiple types of fragmentation emerge with increasing degeneracies.

Degeneracies and interactions lead to strongly correlated states.

Condensation can vanish due to fragmentation phenomena.

Abstract

We present the theory of bosonic systems with multiple condensates, unifying disparate models which are found in the literature, and discuss how degeneracies, interactions, and symmetries conspire to give rise to this unusual behavior. We show that as degeneracies multiply, so do the types of fragmentation, eventually leading to strongly correlated states with no trace of condensation.