Period-Tripling Subharmonic Oscillations in a Driven Superconducting Resonator

ORAL

Abstract

We have observed period-tripling subharmonic oscillations in a driven superconducting coplanar waveguide resonator operated in the quantum regime, kBT << hω/2π. The resonator is terminated by a tunable inductance that provides a Kerr-type nonlinearity. We detected the output field quadratures at frequencies near the fundamental mode, ω/2π ∼ 5 GHz, when current driving the resonator with an external signal at 3ω, with amplitude exceeding an instability threshold. We observed three stable radiative states with equal amplitudes, phase-shifted by 2π/3 radians, red-detuned from the fundamental mode. The downconversion from 3ω to ω is strongly enhanced by near-resonant excitation of the second mode of the resonator, and the cross-Kerr effect. Our experimental results are in quantitative agreement with a model for the driven dynamics of two coupled modes.

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Presenters

  • Ida-Maria Svensson

    Microtechnology and nanoscience, Chalmers University of Technology, Microtechnology and Nanoscience (MC2), Chalmers University of Technology

Authors

  • Ida-Maria Svensson

    Microtechnology and nanoscience, Chalmers University of Technology, Microtechnology and Nanoscience (MC2), Chalmers University of Technology

  • Andreas Bengtsson

    MC2, Chalmers University of Technology, Microtechnology and nanoscience, Chalmers University of Technology, Microtechnology and Nanoscience, Chalmers University of Technology, Microtechnology and Nanoscience (MC2), Chalmers University of Technology

  • Philip Krantz

    Microtechnology and nanoscience, Chalmers University of Technology, Research Laborotary of Electronics, Massachusetts Institute of Technology, Massachusetts Inst of Tech-MIT, Research Laboratory of Electronics, Massachusetts Inst of Tech-MIT, Research Laboratory of Electronics, Massachusetts Institute of Technology

  • Jonas Bylander

    MC2, Chalmers University of Technology, Microtechnology and nanoscience, Chalmers University of Technology, Microtechnology and Nanoscience, Chalmers University of Technology, Microtechnology and Nanoscience (MC2), Chalmers University of Technology

  • Vitaly Shumeiko

    Microtechnology and nanoscience, Chalmers University of Technology

  • Per Delsing

    MC2, Chalmers University of Technology, Microtechnology and nanoscience, Chalmers University of Technology, Microtechnology and Nanoscience, Chalmers University of Technology, Microtechnology and Nanoscience (MC2), Chalmers University of Technology