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DY: Fachverband Dynamik und Statistische Physik

DY 30: Nonlinear stochastic systems

DY 30.6: Talk

Friday, March 27, 2009, 11:30–11:45, ZEU 118

Entropic Stochastic Resonance — •P. Sekhar Burada, Gerhard Schmid, and Peter Hänggi — Institut für Physik, Universität Augsburg, D-86135 Augsburg

We present a novel scheme [1] for the appearance of Stochastic Resonance [2] when the motion of a Brownian particle takes place in a confined medium. The presence of curved boundaries, giving rise to a nonlinear entropic contribution to the potential, may upon application of a periodic driving force result in an increase of the spectral amplification at an optimum value of the ambient noise level [1]. The Entropic Stochastic Resonance (ESR), characteristic of small-scale systems, may constitute a useful mechanism for the manipulation and control of single molecules and nanodevices.

[1] P.S. Burada, G. Schmid, D. Reguera, M.H. Vainstein, J.M. Rubi, and P. Hänggi, Phys. Rev. Lett. 101, 130602 (2008)

[2] L. Gammaitoni, P. Hänggi, P. Jung, and F. Marchesoni, Rev. Mod. Phys. 70, 223 (1998)