Fine structure of the stripe phase in ring-shaped Bose-Einstein condensates with spin-orbital-angular-momentum coupling

TL;DR

This paper provides a theoretical analysis of the fine structure within the stripe phase of a ring-shaped Bose-Einstein condensate with spin-orbital-angular-momentum coupling, revealing sub-phases observable under experimental conditions.

Contribution

It uncovers the detailed fine structure of the stripe phase and demonstrates the existence and observability of stripe sub-phases in such condensates.

Findings

Existence of stripe sub-phases within the phase diagram.

Traceability of sub-phases through physical observables.

Predicted sub-phases observable under experimental conditions.

Abstract

We report on a theoretical study of a ring-shaped Bose-Einstein condensate with Raman-induced spin-orbital-angular-momentum coupling. We analyze the structure of the ground-state of the system depending different physical parameters and reveal a peculiar fine structure within the stripe phase on the phase diagram. We demonstrate the existence of the predicted stripe sub-phases within a wide range of physical parameters, their traceability through physical observables, and compare the results with several commonly used variational approximations. We also show that predicted sub-phases of the stripe phase can be observed within experimentally realizable conditions.