Bona fide stochastic resonance under nonGaussian active fluctuations.

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 τ _P and correlation time τ _c , shows a series of equally-spaced peaks in the residence time distribution at integral multiples of τ _P . The strength of the first peak is found to be maximum when the mean residence time  _d matches the double condition, 4 τ _c ≈ τ _P ≈  _d /2, demonstrating a new type of bona fide 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.