Exploring Non-equilibrium Phase Transitions in a Strontium Cavity QED System

POSTER

Abstract

Cavity quantum electrodynamics (cavity QED) has emerged as a promising platform for quantum simulation of many-body physics. Here we report the observation of out-of-equilibrium phase transitions in two distinct models with a strontium cavity QED experiment. First, we observe rich dynamical phases of BCS superconductors and demonstrate novel time-resolved spectral gap spectroscopy [1,2]. On a separate front, we realize the cooperative resonance fluorescence (CRF) model and observe the predicted continuous dissipation-induced superradiant transition [3,4]. In addition, we detail progress on a new experiment: correlated hopping along a synthetic dimension in the ground states of 87-Sr atoms, expanding the scope of models that can be studied with a cavity QED system.

[1] D. J. Young, A. Chu et al., Nature 625, 679-684 (2024).

[2] D. J. Young et al., arXiv preprint arXiv:2408.12640

[3] H. J. Carmichael, Journal of Physics B: Atomic and Molecular Physics 13, 3551 (1980)

[4] E. Y. Song et al., arXiv preprint arXiv:2408.11086

[5] A. Chu, A. Piñeiro Orioli, D. Barberena, J. K. Thompson, and A. M. Rey, Phys. Rev. Res. 5, L022034 (2023).

*This material is based upon work supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Systems Accelerator. We acknowledge additional funding support from the VBFF, the National Science Foundation under Grant Numbers PFC PHY-2317149 (Physics Frontier Center) and OMA-2016244 (QLCI Q-SEnSE) and NIST. J.T.Y. was supported by the NWO Talent Programme (project number VI.Veni.222.312), which is (partly) financed by the Dutch Research Council (NWO). D.B. was supported by the Simons collaboration on Ultra-Quantum Matter (UQM) which is funded by grants from the Simons Foundation (Grant No. 651440), and acknowledges the hospitality of the KITP while parts of this work were completed.

Publication: [1] D. J. Young, A. Chu et al., Nature 625, 679-684 (2024).
[2] D. J. Young et al., arXiv preprint arXiv:2408.12640
[3] E. Y. Song et al., arXiv preprint arXiv:2408.11086

Presenters

  • Eric Y Song

    • JILA

Authors

  • Eric Y Song

    • JILA

  • Dylan J Young

    • JILA

  • Seth H Chew

    • JILA, NIST, and Department of Physics, University of Colorado, Boulder, CO, USA
    • JILA

  • Joyce Kwan

    • Harvard University; University of Colorado Boulder
    • Harvard University

  • Diego Barberena

    • T.C.M. Group, Cavendish Laboratory, University of Cambridge

  • Anjun Chu

    • JILA
    • University of Chicago

  • Edwin Chaparro

    • University of Colorado, Boulder

  • Sanaa Agarwal

    • JILA
    • JILA, University of Colorado Boulder

  • David Wellnitz

    • JILA

  • Jeremy T Young

    • JILA

  • Zhijing Niu

    • JILA

  • Vera M Schäfer

    • JILA, University of Colorado

  • Robert J Lewis-Swan

    • University of Oklahoma

  • Ana Maria Rey

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

  • James K Thompson

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