Quantum phases of lattice dipolar bosons coupled to a high-finesse cavity

TL;DR

This paper investigates the quantum phases of dipolar bosons in optical lattices coupled to a high-finesse cavity, revealing enhanced solid and supersolid phases through quantum Monte Carlo simulations, with implications for experimental realization.

Contribution

It provides the first unbiased numerical study of combined dipolar and cavity-mediated interactions leading to novel quantum phases.

Findings

Checkerboard solid phase is enhanced.

Checkerboard supersolid phase exists over a wide density range.

Results suggest experimental feasibility with magnetic atoms.

Abstract

Two types of long range interactions, dipolar interaction and cavity-mediated interaction lead to exotic quantum phases. Both interactions have been realized and observed in optical lattice setups. Here, we study quantum phases of dipolar bosons trapped in optical lattices and coupled to a high-finesse cavity where both dipolar interaction and cavity-mediated interaction coexist. We perform quantum Monte Carlo simulations, and find that the checkerboard solid is enhanced and the checkerboard supersolid phase can exist in a wide range of densities (e.g. $ 0.27\lesssim n\lesssim0.73 $). Our unbiased numerical results suggest that both solid and supersolid phases can be achieved experimentally with magnetic atoms coupled to a cavity.