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Title: Properties of resonant activation phenomena
Author: Boguñá, Marián
Porrà i Rovira, Josep Maria
Masoliver, Jaume, 1951-
Lindenberg, Katja
Keywords: Física estadística
Química física
Física matemàtica
Statistical physics
Physical and theoretical chemistry
Mathematical physics
Issue Date: 1998
Publisher: The American Physical Society
Abstract: The phenomenon of resonant activation of a Brownian particle over a fluctuating barrier is revisited. We discuss the important distinctions between barriers that can fluctuate among up and down configurations, and barriers that are always up but that can fluctuate among different heights. A resonance as a function of the barrier fluctuation rate is found in both cases, but the nature and physical description of these resonances is quite distinct. The nature of the resonances, the physical basis for the resonant behavior, and the importance of boundary conditions are discussed in some detail. We obtain analytic expressions for the escape time over the barrier that explicitly capture the minima as a function of the barrier fluctuation rate, and show that our analytic results are in excellent agreement with numerical results.
Note: Reproducció del document publicat a:
It is part of: Physical Review E, 1998, vol. 57, núm. 4, p. 3990-4002
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ISSN: 1063-651X
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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