<i>Bona fide</i> stochastic resonance under nonGaussian active fluctuations.
basic_science · Level V
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- Record sourced from PubMed, PMID 36723030.
- Also identified by DOI 10.1039/d2sm01449a.
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Abstract
We report on the experimental observation of stochastic resonance (SR) in a nonGaussian active bath without any periodic modulation. A Brownian particle hopping in a nanoscale double-well potential under the influence of nonGaussian correlated noise, with mean interval <i>τ</i><sub>P</sub> and correlation time <i>τ</i><sub>c</sub>, shows a series of equally-spaced peaks in the residence time distribution at integral multiples of <i>τ</i><sub>P</sub>. The strength of the first peak is found to be maximum when the mean residence time <i></i><sub>d</sub> matches the double condition, 4<i>τ</i><sub>c</sub> ≈ <i>τ</i><sub>P</sub> ≈ <i></i><sub>d</sub>/2, demonstrating a new type of <i>bona fide</i> SR. The experimental findings agree with a simple model that explains the emergence of SR without periodic modulation of the double-well potential. Additionally, we show that generic SR under periodic modulation, known to degrade in strongly correlated continuous noise, is recovered by the discrete nonGaussian kicks.