Stable dilute supersolid of two-dimensional dipolar bosons

TL;DR

This paper demonstrates the stabilization of a dilute two-dimensional dipolar bosonic system into a supersolid phase by incorporating three-body repulsive interactions, expanding understanding of quantum phases in dipolar gases.

Contribution

It introduces a model with three-body repulsion that stabilizes dilute 2D dipolar bosons, enabling the realization of stable supersolid states in continuous space.

Findings

Stable supersolid phases are achievable in dilute 2D dipolar bosons.

The phase diagram includes regions of supersolid, superfluid, and normal phases.

Three-body interactions are essential for system stability.

Abstract

We consider two-dimensional bosonic dipoles oriented perpendicularly to the plane. On top of the usual two-body contact and long-range dipolar interactions we add a contact three-body repulsion as expected, in particular, for dipoles in the bilayer geometry with tunneling. The three-body repulsion is crucial for stabilizing the system, and we show that our model allows for stable continuous space supersolid states in the dilute regime and calculate the zero-temperature phase diagram.