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arXiv · 1505.00329

Detection of small single-cycle signals by stochastic resonance using a bistable superconducting quantum interference device

Guozhu Sun·Jiquan Zhai·Xueda Wen·Yang Yu·Lin Kang·Weiwei Xu·Jian Chen·Peiheng Wu·Siyuan Han
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Abstract

We propose and experimentally demonstrate detecting small single-cycle and few-cycle signals by using the symmetric double-well potential of a radio frequency superconducting quantum interference device (rf-SQUID). We show that the response of this bistable system to single- and few-cycle signals has a non-monotonic dependence on the noise strength. The response, measured by the probability of transition from initial potential well to the opposite one, becomes maximum when the noise-induced transition rate between the two stable states of the rf-SQUID is comparable to the signal frequency. Comparison to numerical simulations shows that the phenomenon is a manifestation of stochastic resonance.

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Guozhu Sun, Jiquan Zhai, Xueda Wen, Yang Yu, Lin Kang, Weiwei Xu, Jian Chen, Peiheng Wu, Siyuan Han. 2015-05-02. Detection of small single-cycle signals by stochastic resonance using a bistable superconducting quantum interference device. https://doi.org/10.1063/1.4919539

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