Visible stripe phases in spin-orbital-angular-momentum coupled Bose-Einstein condensates

TL;DR

This paper demonstrates theoretically that large-spacing, high-contrast stripe phases, akin to supersolids, can be realized in spin-orbital-angular-momentum coupled Bose-Einstein condensates using experimentally feasible parameters.

Contribution

The authors develop a variational approach that includes first-order interaction effects, advancing beyond previous models to better predict stripe phases in SOAMC BECs.

Findings

Achievable large-spacing, high-contrast stripe phases in SOAMC BECs.

Development of a variational ansatz including first-order interaction effects.

Potential for experimental observation of stripe phases in SOAMC BECs.

Abstract

Recently, stripe phases in spin-orbit coupled Bose-Einstein condensates (BECs) have attracted much attention since they are identified as supersolid phases. In this paper, we exploit experimentally reachable parameters and show theoretically that annular stripe phases with large stripe spacing and high stripe contrast can be achieved in spin-orbital-angular-momentum coupled (SOAMC) BECs. In addition to using Gross-Pitaevskii numerical simulations, we develop a variational ansatz that captures the essential interaction effects to first order, which are not present in the ansatz employed in previous literature. Our work should open the possibility toward directly observing stripe phases in SOAMC BECs in experiments.