Volume 68, Number 6, December 2004
|Page(s)||783 - 789|
|Published online||26 November 2004|
Asymmetric confinement in a noisy bistable device
Dipartimento di Fisica and Istituto Nazionale di Fisica Nucleare Università di Perugia - I-06123 Perugia, Italy
2 Dipartimento di Fisica, Università di Camerino - I-62032 Camerino, Italy
Accepted: 22 October 2004
A Brownian particle hopping in a symmetric double-well potential can be statistically confined to a single well by the simultaneous action of a) two periodic input signals, one tilting the minima, the other one modulating the barrier height; b) an additive and a purely multiplicative random signal, generated by a unique source and thus preserving a certain degree of statistical correlation. In view of technological implementation, such a basic mechanism for asymmetric confinement can be conveniently maximized by tuning the input signal parameters (correlation time, phase/time lag, amplitudes), thus revealing a resonant localization mechanism of wide applicability.
PACS: 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 02.50.Ey – Stochastic processes / 82.20.-w – Chemical kinetics and dynamics
© EDP Sciences, 2004
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