Volume 82, Number 5, June 2008
|Number of page(s)||5|
|Published online||27 May 2008|
Resonant activation: Potential vs. temperature fluctuations
Institute of Physics, Nicolaus Copernicus University - Grudziądzka 5, 87-100 Toruń, Poland, EU
Corresponding author: firstname.lastname@example.org
Accepted: 10 April 2008
The thermal activation over a potential barrier in a stochastically modified system is analyzed. If colored noise perturbs the potential one can observe the famous resonant activation phenomenon. We compare this effect with the results caused by correlated fluctuations of the temperature. For high potential barrier stochastic variations of temperature lead to resonant activation as well. However, for low-barrier or barrierless evolution this effect disappears. We formulate an analytical condition separating these cases and present a physical interpretation of both types of behavior.
PACS: 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 02.50.Ey – Stochastic processes / 82.20.Uv – Stochastic theories of rate constants
© EPLA, 2008
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