Quantum Versus Classical Switching Dynamics of Driven Dissipative Kerr Resonators

• DOI: 10.1103/physrevapplied.13.044017
• Publication Date: 2020-04-09T13:31:32Z
• Authors: Christian Kraglun...; Archana Kamal; Nicholas A. Masluk; Ioan M. Pop; Alexandre Blais; Michel H. Devoret
• Keywords: Mesoscopic physics; Bistability; Dephasing; Semiclassical physics; Parametric oscillator

We report a first-principles study of the driven dissipative dynamics for Kerr oscillators in mesoscopic regime. This regime is characterized by large nonlinearity, realized here using nonlinear kinetic inductance array Josephson junctions. The experimentally measured resonance lineshapes junction modes show significant deviations from steady-state numerical predictions, and necessitate time-dependent simulations indicative strong measurement-induced dephasing system arising cross-Kerr effect between modes. Analytical calculations switching rate corroborate this showing emergence slow time scale, which much longer than linear decay set fluctuation-induced times bistable Furthermore, our analysis shows that usual quantum-activated escape treatment inadequate prediction rates at frequency shifts caused nonlinearities, necessitating quantum utilizes full Liouvillian. Based on analysis, we identify universal crossover parameter delineates regimes validity semiclassical descriptions, respectively. Our work how dynamical effects strongly systems provide platform to quantum-to-classical transitions.