• Open Access

Exploring helical phases of matter in bosonic ladders

Andreas Haller, Apollonas S. Matsoukas-Roubeas, Yueting Pan, Matteo Rizzi, and Michele Burrello
Phys. Rev. Research 2, 043433 – Published 29 December 2020

Abstract

Ladder models of ultracold atoms offer a versatile platform for the experimental and theoretical study of different phenomena and phases of matter linked to the interplay between artificial gauge fields and interactions. Strongly correlated helical states are known to appear for specific ratios of the particle and magnetic flux densities, and they can often be interpreted as a one-dimensional limit of fractional quantum Hall states, thus being called pretopological. Their signatures, however, are typically hard to observe due to the small gaps characterizing these states. Here we investigate bosonic ladder models at filling factor ν=1. Based on bosonization, renormalization group, and matrix product state simulations we pinpoint two strongly correlated helical phases appearing at this resonance. We show that one of them can be accessed in systems with two-species hardcore bosons and on-site repulsions only, thus amenable for optical lattice experiments. Its signatures are sizable and stable over a broad range of parameters for realistic system sizes.

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  • Received 12 October 2020
  • Accepted 8 December 2020

DOI:https://doi.org/10.1103/PhysRevResearch.2.043433

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalCondensed Matter, Materials & Applied Physics

Authors & Affiliations

Andreas Haller1, Apollonas S. Matsoukas-Roubeas2, Yueting Pan3, Matteo Rizzi4,5, and Michele Burrello2

  • 1Institute of Physics, Johannes Gutenberg University, D-55099 Mainz, Germany
  • 2Niels Bohr International Academy and Center for Quantum Devices, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
  • 3Center for Advanced Quantum Studies, Department of Physics, Beijing Normal University, 100875 Beijing, China
  • 4Forschungszentrum Jülich, Institute of Quantum Control, Peter Grünberg Institut (PGI-8), 52425 Jülich, Germany
  • 5Institute for Theoretical Physics, University of Cologne, D-50937 Köln, Germany

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Issue

Vol. 2, Iss. 4 — December - December 2020

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