Dynamical generation of spin squeezing in ultra-cold dipolar molecules

ORAL

Abstract

We study the generation of spin-squeezing via long-range dipolar interactions in a quasi two-dimensional quantum degenerate dipolar molecular gas. To describe the many-body spin dynamics of the molecules we derive a long-range interacting XXZ model in the space of harmonic oscillator states and internal rotational levels valid in the regime where motional degrees of freedom are frozen. We predict the system to behave close to the collective limit resulting in robust spin dynamics and generation of entanglement in the form of spin squeezing even at finite temperature and in presence of dephasing and chemical reactions. We discuss how the internal state structure allows to realise time-reversal and robust metrological sensing protocols, enabling squeezing enhanced sensing of electric fields with dipolar molecular gases.

*This work is supported by DARPA DRINQS and ARO grant W911NF-16-1-0576, W911NF-19-1-0210, AFOSR grants FA9550-18-1-0319 , FA9550-19-1-027, NSF PHY1820885, NSF JILA-PFC PHY-1734006 grants, NSF QLCI-2016244 and by NIST.

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Publication: arXiv: 2011.08202 (PRL in press)

Presenters

  • Thomas Bilitewski

    • University of Colorado, Boulder
    • JILA, University of Colorado Boulder

Authors

  • Thomas Bilitewski

    • University of Colorado, Boulder
    • JILA, University of Colorado Boulder

  • Luigi de Marco

    • JILA and University of Colorado Boulder
    • JILA, University of Colorado Boulder
    • JILA

  • Jun-Ru Li

    • JILA and University of Colorado Boulder
    • JILA, University of Colorado Boulder
    • JILA

  • Kyle Y Matsuda

    • JILA and University of Colorado Boulder
    • JILA, University of Colorado Boulder
    • University of Colorado, Boulder

  • William G Tobias

    • JILA and University of Colorado Boulder
    • JILA, University of Colorado Boulder
    • University of Colorado, Boulder

  • Giacomo Valtolina

    • JILA and University of Colorado Boulder
    • JILA, University of Colorado Boulder
    • University of Colorado, Boulder

  • Jun Ye

    • JILA and University of Colorado Boulder
    • JILA, University of Colorado, Boulder
    • University of Colorado, Boulder
    • JILA, NIST, and University of Colorado Boulder
    • JILA, University of Colorado Boulder
    • JILA, University of Colorado and National Institute of Standards and Technology, and Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
    • JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
    • JILA, NIST, and Department of Physics, University of Colorado, Boulder
    • JILA, NIST, and University of Colorado, Boulder
    • JILA, NIST, and University of Colorado at Boulder

  • Ana Maria Rey

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