Spectroscopic Observation of Crossover from Classical Duffing Oscillator to Kerr Parametric Oscillator

ORAL

Abstract

A Kerr parametric oscillators (KPO) is a parametric oscillator in the single-photon Kerr regime, where the Kerr nonlinearity is larger than the photon loss rate (but not as large as transmon qubits). This regime is relatively unexplored, and the KPOs have a wide range of potential applications such as deterministic generation of Schrödinger cat state [1] and quantum computation [2]. We study microwave response of a Josephson parametric oscillator consisting of a superconducting transmission-line resonator with an embedded dc-SQUID. The dc-SQUID allows to control the magnitude of a Kerr nonlinearity over the ranges where it is smaller or larger than the photon loss rate. Spectroscopy measurements reveal the change of the microwave response from a classical Duffing oscillator to a Kerr parametric oscillator in a single device. In the single-photon Kerr regime, we observe parametric oscillations with a well-defined phase of either 0 or π, whose probability can be controlled by an externally injected signal.

[1] H. Goto, et al., Phys. Rev. A 99, 023838 (2019).
[2] H. Goto, Sci. Rep. 6, 21686 (2016).

*This work was partly supported by JST ERATO and based on results obtained from a project commissioned by the New Energy and Industrial Technology Development Organization (NEDO).

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Presenters

  • Tomohiro Yamaji

    • System Platform Research Laboratories, NEC Corporation

Authors

  • Tomohiro Yamaji

    • System Platform Research Laboratories, NEC Corporation

  • Sota Kagami

    • System Platform Research Laboratories, NEC Corporation

  • Aiko Yamaguchi

    • System Platform Research Laboratories, NEC Corporation

  • Tetsuro Satoh

    • System Platform Research Laboratories, NEC Corporation

  • Kazuki Koshino

    • Tokyo Medical and Dental University
    • College of Liberal Arts and Sciences, Tokyo Medical and Dental University
    • TMDU

  • Hayato Goto

    • Corporate Research and Development Center, Toshiba Corporation
    • Toshiba Corp

  • Zhirong Lin

    • Center for Emergent Matter Science (CEMS), RIKEN
    • Shanghai Institute of Microsystem and Information Technology

  • Yasunobu Nakamura

    • The University of Tokyo
    • Center for Emergent Matter Science, RIKEN
    • Center for Emergent Matter Science (CEMS), RIKEN
    • RCAST, The University of Tokyo
    • Research Center for Advanced Science and Technology, The University of Tokyo
    • Research Center for Advanced Science and Technology (RCAST), The University of Tokyo
    • RIKEN

  • Tsuyoshi Yamamoto

    • System Platform Research Laboratories, NEC Corporation
    • NEC Corporation