Title | Topological edge states and Aharanov-Bohm caging with ultracold atoms carrying orbital angular momentum |
Publication Type | Journal Article |
Year of Publication | 2019 |
Authors | Pelegrí, G, Marques, AM, Dias, RG, Daley, AJ, Mompart, J, Ahufinger, V |
Journal | Phys. Rev. A |
Volume | 99 |
Pagination | 023613 |
Date Published | Feb |
Abstract | We show that bosonic atoms loaded into orbital angular momentum l=1 states of a lattice in a diamond-chain geometry provide a flexible and simple platform for exploring a range of topological effects. This system exhibits robust edge states that persist across the gap-closing points, indicating the absence of a topological transition. We discuss how to perform the topological characterization of the model with a generalization of the Zak's phase and we show that this system constitutes a realization of a square-root topological insulator. Furthermore, the relative phases arising naturally in the tunneling amplitudes lead to the appearance of Aharanov-Bohm caging in the lattice. We discuss how these properties can be realized and observed in ongoing experiments. |
URL | https://link.aps.org/doi/10.1103/PhysRevA.99.023613 |
DOI | 10.1103/PhysRevA.99.023613 |
