#### Filter Results:

#### Publication Year

2004

2016

#### Publication Type

#### Co-author

#### Key Phrase

#### Publication Venue

#### Cell Type

#### Organism

Learn More

The noise can stabilize a fluctuating or a periodically driven metastable state in such a way that the system remains in this state for a longer time than in the absence of white noise. This is the noise enhanced stability phenomenon, observed experimentally and numerically in different physical systems. After shortly reviewing all the physical systems… (More)

We derive general equations for the nonlinear relaxation time of Brownian diffusion in randomly switching potential with a sink. For piece-wise linear dichotomously fluctuating potential with metastable state, we obtain the exact average lifetime as a function of the potential parameters and the noise intensity. Our result is valid for arbitrary white noise… (More)

- B Spagnolo, A A Dubkov, A L Pankratov, E V Pankratova, A Fiasconaro, A Ochab-Marcinek
- 2008

Transient properties of different physical systems with metastable states perturbed by external white noise have been investigated. Two noise-induced phenomena, namely the noise enhanced stability and the resonant activation, are theoretically predicted in a piece-wise linear fluctuating potential with a metastable state. The enhancement of the lifetime of… (More)

After a short excursion from discovery of Brownian motion to the Richardson " law of four thirds " in turbulent diffusion, the article introduces the Lévy flight superdif-fusion as a self-similar Lévy process. The condition of self-similarity converts the infinitely divisible characteristic function of the Lévy process into a stable characteristic function… (More)

We investigate the overdamped Brownian motion in a supersymmetric periodic potential switched by Markovian dichotomous noise between two configurations. The two configurations differ from each other by a shift of one-half period. The calculation of the effective diffusion coefficient is reduced to the mean first passage time problem. We derive general… (More)

We consider a Lotka-Volterra system of two competing species subject to multiplicative α-stable Lévy noise. The interaction parameter between the species is a random process which obeys a stochastic differential equation with a generalized bistable potential in the presence both of a periodic driving term and an additive α-stable Lévy noise. We study the… (More)

The phenomena of dissonance and consonance in a simple auditory sensory model composed of three neurons are considered. Two of them, here so-called sensory neurons, are driven by noise and subthreshold periodic signals with different ratio of frequencies, and its outputs plus noise are applied synaptically to a third neuron, so-called interneuron. We… (More)

- An Iop, Sissa Journal, A A Dubkov, P Hänggi, I Goychuk
- 2009

The non-linear dissipation corresponding to a non-Gaussian thermal bath is introduced together with a multiplicative white noise source in the phenomenological Langevin description for the velocity of a particle moving in some potential landscape. Deriving the closed Kolmogorov's equation for the joint probability distribution of the particle displacement… (More)

The nonlinear dynamics of complex systems is one of the most exciting and fastest growing branches of modern sciences. This research area is at the forefront in interdisciplinary research and it has an increasingly important impact on a variety of applied subjects ranging from the study of turbulence and the behavior of the weather, through the… (More)

- A A Dubkov, B Spagnolo
- 2008

The transient dynamics of the Verhulst model perturbed by arbitrary non-Gaussian white noise is investigated. Based on the infinitely divisible distribution of the Lévy process we study the nonlinear relaxation of the population density for three cases of white non-Gaussian noise: (i) shot noise, (ii) noise with a probability density of increments expressed… (More)