https://doi.org/10.1140/epjb/e2009-00050-6
Stochastic resonance in bistable confining potentials
On the role of confinement
1
National Institute of Chemical Physics and Biophysics, Rävala 10, 15042 Tallinn, Estonia
2
IFISC, Instituto de Física Interdisciplinar y Sistemas Complejos (CSIC-UIB), 07122 Palma de Mallorca, Spain
3
Dipartimento di Fisica, Università di Camerino, 62032 Camerino, Italy
Corresponding author: a els@ifisc.uib-csic.es
Received:
19
December
2008
Revised:
13
January
2009
Published online:
18
February
2009
We study the effects of the confining conditions on the occurrence of stochastic resonance (SR) in continuous bistable systems. We model such systems by means of double-well potentials that diverge like |x|q for |x|↦∞. For super-harmonic (hard) potentials with q > 2 the SR peak sharpens with increasing q, whereas for sub-harmonic (soft) potentials, q < 2, it gets suppressed.
PACS: 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 02.50.Ey – Stochastic processes
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009