Supersolid Vortex Crystals in Rydberg-dressed Bose-Einstein Condensates

TL;DR

This paper investigates how Rydberg-dressed Bose-Einstein condensates exhibit supersolid phases and vortex crystal structures under rotation, combining simulations and mean field calculations to reveal new quantum states.

Contribution

It introduces the study of supersolid vortex crystals in Rydberg-dressed BECs, highlighting the competition between supersolid order and vortex lattice formation.

Findings

Identification of supersolid states in Rydberg-dressed BECs.

Discovery of vortex crystal phases at rapid rotation.

Demonstration of phase competition between supersolidity and vortices.

Abstract

We study rotating quasi-two-dimensional Bose-Einstein-condensates, in which atoms are dressed to a highly excited Rydberg state. This leads to weak effective interactions that induce a transition to a mesoscopic supersolid state. Considering slow rotation, we determine its superfluidity using Quantum Monte-Carlo simulations as well as mean field calculations. For rapid rotation, the latter reveal an interesting competition between the supersolid crystal structure and the rotation-induced vortex lattice that gives rise to new phases, including arrays of mesoscopic vortex crystals.