Single-photon driven high-order sideband transitions in an ultrastrongly coupled circuit quantum electrodynamics system

ORAL

Abstract

We report the experimental observation of high-order sideband transitions at the single-photon level in a quantum circuit system of a flux qubit ultrastrongly coupled to a coplanar waveguide resonator. With the coupling strength reaching $\mathrm{10\% }$ of the resonator's fundamental frequency, we obtain clear signatures of higher-order red- and first-order blue-sideband transitions. These transitions are owing to the ultrastrong Rabi coupling, instead of the driving power. Our observation advances the understanding of ultrastrongly-coupled systems and paves the way to study high-order processes in the quantum Rabi model.

*This work is supported by the National Basic Research Program of China and the National Natural Science Foundation of China.

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Authors

  • Tie-Fu Li

    • Tsinghua University

  • Zhen Chen

    • Beijing Computational Science Research Center

  • Yimin Wang

    • Beijing Computational Science Research Center

  • Lin Tian

    • School of Natural Sciences, University of California, Merced, CA 95343, USA
    • University of California, Merced

  • Yueyin Qiu

    • Beijing Computational Science Research Center

  • Kunihiro Inomata

    • RIKEN Center for Emergent Matter Science
    • Institute of Physical and Chemical Research(RIKEN)

  • Fumiki Yoshihara

    • National Institute of Information and Communications Technology, Koganei, Tokyo
    • Institute of Physical and Chemical Research(RIKEN)

  • Siyuan Han

    • University of Kansas

  • Franco Nori

    • RIKEN, Japan
    • RIKEN - Saitama
    • Institute of Physical and Chemical Research(RIKEN)
    • Center for Emergent Matter Science, RIKEN

  • Jaw-Shen Tsai

    • Tokyo University of Science

  • J. Q. You

    • Beijing Computational Science Research Center
    • CSRC