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Abstract: We report the observation of photon generation in a microwave cavity with atime-dependent boundary condition. Our system is a microfabricated quarter-wavecoplanar waveguide cavity. The electrical length of the cavity is varied usingthe tunable inductance of a superconducting quantum interference device. It ismeasured in the quantum regime, where the temperature is significantly lessthan the resonance frequency ~ 5 GHz. When the length is modulated atapproximately twice the static resonance frequency, spontaneous oscillations ofthe cavity field are observed. Time-resolved measurements of the dynamicalstate of the cavity show multiple stable states. The behavior is well describedby theory. Connections to the dynamical Casimir effect are discussed.



Autor: C.M. Wilson, T. Duty, M. Sandberg, F. Persson, V. Shumeiko, P. Delsing

Fuente: https://arxiv.org/







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