6533b85ffe1ef96bd12c23e9
RESEARCH PRODUCT
false
Bernardo SpagnoloG. AugelloDavide ValentiFalciAlessandro FiasconaroP. CaldaraAngelo La CognataDubkovsubject
Josephson effectPhysicsThermal reservoirQuantum mechanicsMetastabilityQuantum noiseTime evolutionGeneral Physics and AstronomyNoise (electronics)QuantumMultiplicative noisedescription
classical and quantum systems are investigated. First, the role of multiplicative and additive noise in a classical metastable system is analyzed. The mean lifetime of the metastable state shows a nonmonotonic behavior with a maximum as a function of both the additive and multiplicative noise intensities. In the second system, the simultaneous action of thermal and non-Gaussian noise on the dynamics of an overdamped point Josephson junction is studied. The eect of a Levy noise generated by a Cauchy‐Lorentz distribution on the mean lifetime of the superconductive metastable state, in the presence of a periodic driving, is investigated. We find resonant activation and noise enhanced stability in the presence of Levy noise. Finally, the time evolution of a quantum particle moving in a metastable potential and interacting with a thermal reservoir is analyzed. Within the Caldeira‐Legget model and the Feynman‐Vernon functional approach, we obtain the time evolution of the population distributions in the position eigenstates of the particle, for dierent values of the thermal bath coupling strength.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-01-01 | Acta Physica Polonica B |