Search results for "Random walks and Levy flight"

showing 2 items of 2 documents

Two competing species in super-diffusive dynamical regimes

2010

The dynamics of two competing species within the framework of the generalized Lotka-Volterra equations, in the presence of multiplicative alpha-stable Lévy noise sources and a random time dependent interaction parameter, is studied. The species dynamics is characterized by two different dynamical regimes, exclusion of one species and coexistence of both, depending on the values of the interaction parameter, which obeys a Langevin equation with a periodically fluctuating bistable potential and an additive alpha-stable Lévy noise. The stochastic resonance phenomenon is analyzed for noise sources asymmetrically distributed. Finally, the effects of statistical dependence between multiplicative …

Fluctuation phenomena random processes noise and Brownian motionPhysicsSettore FIS/02 - Fisica Teorica Modelli E Metodi MatematiciBistabilityStochastic resonanceDifferential equationLotka–Volterra equationsProbability theory stochastic processes and statisticStochastic analysis methods (Fokker-Planck Langevin etc.)Population dynamicCondensed Matter PhysicsNoise (electronics)Multiplicative noiseElectronic Optical and Magnetic MaterialsBackground noiseLangevin equationRandom walks and Levy flightQuantitative Biology::Populations and EvolutionStatistical physicsThe European Physical Journal B
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THE ROLE OF NON-GAUSSIAN SOURCES IN THE TRANSIENT DYNAMICS OF LONG JOSEPHSON JUNCTIONS

2013

We analyze the effects of different non-Gaussian noise sources on the transient dynamics of an overdamped long Josephson junction. We find nonmonotonic behavior of the mean escape time as a function of the noise intensity and frequency of the external driving signal for all the noise sources investigated.

Josephson effectPhysicsFluctuation phenomena random processes noise and Brownian motionCondensed matter physicsGaussianJosephson devicesDynamics (mechanics)General Physics and AstronomyJosephson energyComputational methods in statistical physics and nonlinear dynamicSettore FIS/03 - Fisica Della MateriaPi Josephson junctionsymbols.namesakeRandom walks and Levy flightsymbolsTransient (oscillation)
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