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Physics  2006 

Signal Amplification in NbN Superconducting Resonators via Stochastic Resonance

DOI: 10.1016/j.physleta.2007.05.103

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We exploit nonlinearity in NbN superconducting stripline resonators, which is originated by local thermal instability, for studying stochastic resonance. As the resonators are driven into instability, small amplitude modulated (AM) microwave signals are amplified with the aid of injected white noise. The dependence of the signal amplification on the modulation amplitude and the modulation frequency is examined and compared with theory.


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