Supersolid phase in atomic gases with magnetic dipole interaction

TL;DR

This paper demonstrates that by increasing atomic filling in optical lattices with magnetic dipole interactions, a stable supersolid phase can be realized, overcoming previous experimental challenges.

Contribution

It introduces a method to enhance energy scales in dipolar gases, enabling the observation of supersolidity with realistic parameters.

Findings

Stable supersolid phase identified for chromium atoms.

Enhanced energy scales via large atomic filling.

Mean-field theory accurately describes the phase diagram.

Abstract

A major obstacle for the experimental realization of a supersolid phase with cold atomic gases in an optical lattice is the weakness of the nearest-neighbor interactions achievable via magnetic dipole-dipole interactions. In this letter, we show that using a large filling of atoms within each well the characteristic energy scales are strongly enhanced. Within this regime, the system is well described by the rotor model, and the qualitative behavior of the phase diagram derives from mean-field theory. We find a stable supersolid phase for realistic parameters with chromium atoms.