Regensburg 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
DY: Fachverband Dynamik und Statistische Physik
DY 10: Nonlinear Dynamics I
DY 10.4: Vortrag
Dienstag, 23. März 2010, 14:45–15:00, H46
Double entropic stochastic resonance — P. Sekhar Burada1,2, •Gerhard Schmid2, and Peter Hänggi2 — 1MPI for the Physics of Complex Systems, Dresden, Germany — 2University of Augsburg, Augsburg, Germany
We demonstrate the appearance of a purely entropic stochastic resonance (ESR). This new phenomena is occurring in geometrically confined systems [1,2], where the irregular boundaries cause entropic barriers. The interplay between a periodic input signal, a constant bias and intrinsic thermal noise, leads to a resonant ESR phenomenon in which feeble signals become amplified. This new phenomenon is characterized by the presence of two peaks in the spectral amplification at corresponding optimal values of the noise strength. The nature of ESR, occurring when the origin of the barrier is entropic rather than energetic, offers new perspectives for novel investigations and potential applications. ESR by itself presents yet another case where one constructively can harvest noise in driven nonequilibrium systems.
[1] P. S. Burada, G. Schmid, D. Reguera, M. H. Vainstein, J. M. Rubi, and P. Hänggi, Phys. Rev. Lett. 101, 130602 (2008).
[2] P. S. Burada, G. Schmid, D. Reguera, J. M. Rubi, and P. Hänggi, EPL 87, 50003 (2009).