Topological edge states and Aharanov-Bohm caging with ultracold atoms carrying orbital angular momentum
Pelegrí, G. and Marques, A. M. and Dias, R. G. and Daley, A. J. and Mompart, J. and Ahufinger, V. (2019) Topological edge states and Aharanov-Bohm caging with ultracold atoms carrying orbital angular momentum. Physical Review A, 99 (2). 023613. ISSN 2469-9926 (https://doi.org/10.1103/PhysRevA.99.023613)
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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.
ORCID iDs
Pelegrí, G., Marques, A. M., Dias, R. G., Daley, A. J. ORCID: https://orcid.org/0000-0001-9005-7761, Mompart, J. and Ahufinger, V.;-
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Item type: Article ID code: 67389 Dates: DateEvent11 February 2019Published11 February 2019AcceptedSubjects: Science > Physics Department: Faculty of Science > Physics Depositing user: Pure Administrator Date deposited: 20 Mar 2019 16:44 Last modified: 01 Oct 2024 08:22 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/67389