Experimental investigation of resonant activation
TLDR
The escape from a metastable state over a fluctuating barrier of a physical system is experimentally investigated and resonant activation, namely a minimum of the average escape time as a function of the correlation rate, is observed.Abstract:
We experimentally investigate the escape from a metastable state over a fluctuating barrier of a physical system. The system is switching between two states under electronic control of a dichotomous noise. We measure the escape time and its probability density function as a function of the correlation rate of the dichotomous noise in a frequency interval spanning more than four frequency decades. We observe resonant activation, namely a minimum of the average escape time as a function of the correlation rate. We detect two regimes in the study of the shape of the escape time probability distribution: (i) a regime of exponential and (ii) a regime of nonexponential probability distribution.read more
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Noise-induced effects in nonlinear relaxation of condensed matter systems
Bernardo Spagnolo,Bernardo Spagnolo,Davide Valenti,Claudio Guarcello,Angelo Carollo,D. Persano Adorno,Stefano Spezia,Nicola Pizzolato,B. Di Paola +8 more
TL;DR: In this article, three noise induced phenomena, namely the noise enhanced stability, the stochastic resonant activation and the noise-induced coherence of electron spin, are reviewed in the nonlinear relaxation dynamics of three different systems of condensed matter.
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Co-occurrence of resonant activation and noise-enhanced stability in a model of cancer growth in the presence of immune response
TL;DR: A stochastic version of a simple enzymatic reaction which follows the generic Michaelis-Menten kinetics is investigated, pointing out the possibility of coexistence of dynamical regimes where noise-enhanced stability and resonant activation phenomena can be observed together.
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Effects of Lévy noise on the dynamics of sine-Gordon solitons in long Josephson junctions
TL;DR: In this article, the authors numerically investigate the generation of solitons in current-biased long Josephson junctions in relation to the superconducting lifetime and the voltage drop across the device.
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Dichotomous markov noise: exact results for out-of-equilibrium systems
TL;DR: In particular, it has escaped attention until recently that the standard results for the long-time properties of such systems cannot be applied when unstable fixed points are crossed in the asymptotic regime as discussed by the authors.
Journal ArticleDOI
Nonlinear Relaxation Phenomena in Metastable Condensed Matter Systems
Bernardo Spagnolo,Claudio Guarcello,Luca Magazzù,Angelo Carollo,Dominique Persano Adorno,Davide Valenti +5 more
TL;DR: In this paper, the average escape time from these metastable states in the presence of Gaussian and correlated fluctuations is calculated, accounting for variations in the noise source intensity and the bias frequency.