Observation of a Dynamical Phase Transition in a Quantum Simulator of Lipkin-Meshkov-Glick Model using Bosonic Gases

ORAL

Abstract

We theoretically propose and experimentally demonstrate the use of motional sidebands in a trapped thermal ensemble of 87Rb atoms to engineer tunable long-range XXZ spin models. We benchmark our simulator by probing a ferromagnetic to paramagnetic dynamical phase transition in the Lipkin-Meshkov-Glick (LMG) model, a collective XXZ model plus additional transverse and longitudinal fields, via Rabi spectroscopy. We experimentally reconstruct the boundary between the dynamical phases, which is in good agreement with mean-field theoretical predictions. Our work introduces new possibilities in quantum simulation of anisotropic spin-spin interactions and quantum metrology enhanced by many-body entanglement.

*This work is supported by AFOSR, DARPA, ARO, NSF, QLCI, JILA-PFC, and NIST.

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Presenters

  • Anjun Chu

    • JILA, NIST and Dept. of Physics, University of Colorado Boulder

Authors

  • Anjun Chu

    • JILA, NIST and Dept. of Physics, University of Colorado Boulder

  • Johannes Will

    • Institut für Quantenoptik, Leibniz Universität Hannover

  • Jan Arlt

    • Institut for Fysik og Astronomi, Aarhus Universitet

  • Carsten Klempt

    • Institut für Quantenoptik, Leibniz Universität Hannover

  • Ana Maria Rey

    • JILA, NIST and Dept. of Physics, University of Colorado Boulder
    • University of Colorado, Boulder
    • JILA, NIST, Department of Physics, University of Colorado, Boulder, CO
    • JILA, NIST, Department of Physics, University of Colorado, Boulder
    • JILA, NIST, Univ. of Colorado Boulder