Supersolidity in Trapped Two-Dimensional Dipolar Droplet Arrays

POSTER

Abstract

We theoretically investigate the ground states and the spectrum of elementary excitations across the superfluid to droplet crystallization transition of an oblate dipolar Bose-Einstein condensate. Using scaling properties that arise from beyond mean-field quantum fluctuations, we systematically identify regimes where spontaneous rotational symmetry breaking leads to the emergence of a supersolid phase with characteristic collective excitations. We find a low-energy Goldstone as well as a Higgs amplitude mode arising from the symmetry breaking. Furthermore, we study the dynamics across the transition and show how these supersolids can be realized with standard protocols in state-of-the-art experiments.

*M.G. and M.Z. acknowledge funding from the Alexander von Humboldt Foundation. T.L. acknowledges funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (Grant agreement No. 949431). This work is supported by the German Research Foundation (DFG) within FOR2247 under Pf381/16-1 and Bu2247/1, Pf381/20-1, FUGG INST41/1056-1 and the QUANT:ERA collaborative project MAQS.

Publication: The paper is currently in preparation.

Presenters

  • Jens Hertkorn

    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart
    • University of Stuttgart

Authors

  • Jens Hertkorn

    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart
    • University of Stuttgart

  • Jan-Niklas Schmidt

    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, University of Stuttgart
    • University of Stuttgart
    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart

  • Mingyang Guo

    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, University of Stuttgart
    • University of Stuttgart
    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart

  • Fabian Boettcher

    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, University of Stuttgart
    • University of Stuttgart
    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart

  • Kevin Ng

    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, University of Stuttgart
    • University of Stuttgart
    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart

  • Sean Graham

    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, University of Stuttgart
    • University of Stuttgart
    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart

  • Paul Uerlings

    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart

  • Hans Peter Büchler

    • Institute for Theoretical Physics III and Center for Integrated Quantum Science and Technology, Universität Stuttgart
    • University of Stuttgart

  • Tim Langen

    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart
    • Universtiy of Stuttgart
    • Stuttgard
    • University of Stuttgart

  • Martin W Zwierlein

    • Massachusetts Institute of Technology MIT
    • MIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, and Department of Physics, Massachusetts Institute of Technology

  • Tilman Pfau

    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany
    • 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart
    • University of Stuttgart
    • 5th Institute of Physics, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany