Level attraction and idler resonance in a strongly driven Josephson cavity

  title={Level attraction and idler resonance in a strongly driven Josephson cavity},
  author={F. Fani Sani and Ines Corveira Rodrigues and Daniel Bothner and Gary A. Steele},
  journal={Physical Review Research},
Nonlinear Josephson circuits play a crucial role in the growing landscape of quantum information and technologies. The typical circuits studied in this field consist of qubits, whose anharmonicity is much larger than their linewidth, and also of parametric amplifiers, which are engineered with linewidths of tens of MHz or more. The regime of small anharmonicity but also narrow linewidth, corresponding to the dynamics of a high-Q Duffing oscillator, has not been extensively explored using… 

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