Título:
|
Properties of resonant activation phenomena
|
Autor/a:
|
Boguñá, Marián; Porrà i Rovira, Josep Maria; Masoliver, Jaume, 1951-; Lindenberg, Katja
|
Otros autores:
|
Universitat de Barcelona |
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. |
Materia(s):
|
-Física estadística -Termodinàmica -Química física -Física matemàtica -Statistical physics -Thermodynamics -Physical and theoretical chemistry -Mathematical physics |
Derechos:
|
(c) American Physical Society, 1998
|
Tipo de documento:
|
Artículo Artículo - Versión publicada |
Editor:
|
The American Physical Society
|
Compartir:
|
|