Topological edge states and Aharanov-Bohm caging with ultracold atoms carrying orbital angular momentum

TL;DR

This paper demonstrates that ultracold bosonic atoms in orbital angular momentum states within a diamond-chain lattice can exhibit topological edge states and Aharanov-Bohm caging, offering a versatile platform for exploring topological phenomena.

Contribution

It introduces a novel experimental setup using orbital angular momentum states in a diamond-chain lattice to study topological effects and Aharanov-Bohm caging in ultracold atoms.

Findings

Presence of robust topological edge states.

Observation of Aharanov-Bohm caging effects.

Feasibility of experimental realization.

Abstract

We show that bosonic atoms loaded into orbital angular momentum $l=1$ states of a lattice in a diamond-chain geometry provides a flexible and simple platform for exploring a range of topological effects. This system exhibits robust edge states, and the relative phases arising naturally in the tunnelling amplitudes lead to the appearance of Aharanov-Bohm caging in the lattice. We discuss how these properties can be realised and observed in ongoing experiments.