著者

Kasai Seiya Ichiki Akihisa Tadokoro Yukihiro

出版者

IOP Publishing

雑誌

Applied Physics Express (APEX) (ISSN:18820778)

巻号頁・発行日

vol.11, no.3, pp.037301, 2018-03

被引用文献数

8

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A bistable system efficiently detects a weak signal by adding noise, which is referred to as stochastic resonance. A previous theory deals with friction in state transition; however, this hypothesis is inadequate when friction force is negligible such as in nano-and molecular-scale systems. We show that, when the transition occurs without friction, the sensitivity of the bistable system to a Gaussian-noise-imposed weak signal becomes significantly high. The sensitivity is determined by the relative difference in noise distribution function. We find that the relative difference in Gaussian distribution function diverges in its tail edge, resulting in a high sensitivity in the present system. (C) 2018 The Japan Society of Applied Physics