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Detection of small single-cycle signals by stochastic resonance using a bistable superconducting quantum interference device
Sun, Guozhu Zhai, Jiquan Wen, Xueda Yu, Yang Kang, Lin Xu, Weiwei Chen, Jian Wu, Peiheng Han, Siyuan
Sun, Guozhu
Zhai, Jiquan
Wen, Xueda
Yu, Yang
Kang, Lin
Xu, Weiwei
Chen, Jian
Wu, Peiheng
Han, Siyuan
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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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2015
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AIP Publishing
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Sun, G., Zhai, J., Wen, X., Yu, Y., Kang, L., Xu, W., ... & Han, S. (2015). Detection of small single-cycle signals by stochastic resonance using a bistable superconducting quantum interference device. Applied Physics Letters, 106(17), 172602.