Bloch Structures in a Rotating Bose-Einstein Condensate

TL;DR

This paper demonstrates that a rotating Bose-Einstein condensate can exhibit Bloch band structures and localized gap soliton states without external periodic potentials, revealing novel quantum phenomena driven by rotation and interactions.

Contribution

It introduces the concept of Bloch structures in a non-periodic system and predicts localized states akin to gap solitons in a rotating BEC.

Findings

Bloch band structures appear in rotating BECs without periodic potentials.

Vortices are generated via a mechanism similar to Bragg reflection.

Localized gap soliton-like states are predicted near the Brillouin zone edge.

Abstract

A rotating Bose-Einstein condensate is shown to exhibit a Bloch band structure without the need of periodic potential. Vortices enter the condensate by a mechanism similar to the Bragg reflection, if the frequency of a rotating drive or the strength of interaction is adiabatically changed. A localized state analogous to a gap soliton in a periodic system is predicted near the edge of the Brillouin zone.