Search results for "Metastability and bistability"

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The bistable potential: An archetype for classical and quantum systems

2012

In this work we analyze the transient dynamics of three different classical and quantum systems. First, we consider a classical Brownian particle moving in an asymmetric bistable potential, subject to a multiplicative and additive noise source. We investigate the role of these two noise sources on the life time of the metastable state. A nonmonotonic behavior of the lifetime as a function of both additive and multiplicative noise intensities is found, revealing the phenomenon of noise enhanced stability. Afterward, by using a LotkaVolterra model, the dynamics of two competing species in the presence of Lévy noise sources is analyzed. Quasiperiodic oscillations and stochastic resonance pheno…

Physicsmultiplicative noiseSettore FIS/02 - Fisica Teorica Modelli E Metodi MatematiciBistabilityThermal reservoirMetastability and bistabilityStochastic resonanceTime evolutionStatistical and Nonlinear Physicsopen quantum systemsCondensed Matter PhysicsNoise (electronics)Multiplicative noisepopulation dynamicnoise enhanced stabilityQuantum mechanicsQuasiperiodic functionStatistical physicsstochastic resonanceQuantumMetastability and bistability; multiplicative noise; noise enhanced stability; stochastic resonance; population dynamics; open quantum systems
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