Topological phases in spin-orbit coupled dipolar lattice bosons

TL;DR

This paper explores how dipolar interactions influence topological phases in spin-orbit coupled bosonic systems within a 1D optical lattice, revealing conditions that broaden the topological regime and proposing a correlation-based detection method.

Contribution

It demonstrates that dipolar interactions can expand the parameter space for topological phases and suggests a practical way to detect these phases experimentally.

Findings

Dipolar interactions broaden the topological phase region.

Spin correlations can indicate topological phases.

Topological phases are stabilized by spin-orbit coupling and dipolar interactions.

Abstract

We study the topological phases in spin-orbit coupled dipolar bosons in a one-dimensional optical lattice. The magnetic dipolar interactions between atoms give rise to the inter-site interactions. In the Mott-insulating regime, this system can be described by the quantum XYZ spin model with the Dzyaloshinskii-Moriya interactions in a transverse field. We focus on investigating the effect of dipolar interactions on the topological phase. The topological phase can be shown when spin-orbit coupling incorporates with the repulsive dipolar interaction. We find that the dipolar interaction can broaden the range of parameters of spin-orbit coupling and transverse field for exhibiting the topological phase. The sum of spin correlations between the two nearest neighbouring atoms can be used to indicate the topological phase. This may be useful for detecting topological phases in experiments.