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Chiral edge dynamics and quantum Hall physics in synthetic dimensions with an atomic erbium Bose-Einstein condensate

Roberto Vittorio Roell*,†, Arif Warsi Laskar*,‡, Franz Richard Huybrechts, and Martin Weitz

  • Institute of Applied Physics, University of Bonn, 53115 Bonn, Germany

  • *These authors contributed equally to this work.
  • †roell@iap.uni-bonn.de
  • ‡laskar@iap.uni-bonn.de
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Phys. Rev. A 107, 043302 – Published 3 April, 2023

DOI: https://doi.org/10.1103/PhysRevA.107.043302

Abstract

Quantum Hall physics is at the heart of research on both matter and artificial systems, such as cold atomic gases, with nontrivial topological order. We report on the observation of a chiral edge current by transferring atomic wave packets simultaneously to opposite edges of a synthetic Hall system realized in the two-dimensional state space formed by one spatial and one synthetic dimension encoded in the J=6 electronic spin of erbium atoms. To characterize the system, the Hall drift of the employed atomic Bose-Einstein condensate in the lowest Landau-like level is determined. The topological properties are verified by determining the local Chern marker, and upon performing low-lying excitations both cyclotron and skipping orbits are observed in the bulk and edges, respectively. Future prospects include studies of novel topological phases in cold-atom systems.

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Phys. Rev. A 107, 043302– Published 3 April, 2023
  • Received 18 October 2022
  • Accepted 17 March 2023
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