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

G. Pelegrí, A. M. Marques, R. G. Dias, A. J. Daley, J. Mompart, V. Ahufinger

Research output: Contribution to journalArticle

1 Citation (Scopus)

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.

LanguageEnglish
Article number023613
Number of pages6
JournalPhysical Review A
Volume99
Issue number2
DOIs
Publication statusPublished - 11 Feb 2019

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angular momentum
orbitals
closing
atoms
platforms
diamonds
insulators
geometry

Keywords

  • bosonic atoms
  • orbital angular momentum
  • topological effects
  • topological characterization

Cite this

Pelegrí, G. ; Marques, A. M. ; Dias, R. G. ; Daley, A. J. ; Mompart, J. ; Ahufinger, V. / Topological edge states and Aharanov-Bohm caging with ultracold atoms carrying orbital angular momentum. In: Physical Review A. 2019 ; Vol. 99, No. 2.
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Topological edge states and Aharanov-Bohm caging with ultracold atoms carrying orbital angular momentum. / Pelegrí, G.; Marques, A. M.; Dias, R. G.; Daley, A. J.; Mompart, J.; Ahufinger, V.

In: Physical Review A, Vol. 99, No. 2, 023613, 11.02.2019.

Research output: Contribution to journalArticle

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