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A: Atomphysik

A 12: Atomare Systeme in externen Feldern I

A 12.2: Talk

Wednesday, March 15, 2006, 14:30–14:45, H6

Hydrogenic Stochastic Resonance — •Kamal P. Singh and Jan M. Rost — Max Planck Institute for the Physics of Complex Systems, Dresden

Stochastic resonance is a counterintuitive mechanism whereby noise enhances the response of nonlinear systems to a weak coherent signal. Despite its presence in remarkably diverse physical systems, only a few quantum mechanical examples of bistable systems have been discussed [1-3]. Here we shall demonstrate the existence of stochastic resonance effect in the simplest atomic system, namely hydrogen. Both the classical and the quantum mechanical description of associated electron dynamics allows us to further investigate the nature of the classical-quantum correspondence principle for the stochastic resonance. We also discuss the possibility of observing the proposed signature in a real experimental setting.
[1] R. Löfstedt and S. N. Coppersmith, Phys. Rev. Lett 72, 1947 (1994)
[2] L. Gammaitoni, P. Hänggi, P. Jung, and F. Marchesoni, Rev. Mod. Phys 70, 223 (1998)
[3] T. Wellens, V. Shatokhin, and A. Buchleitner, Rep. Prog. Phys. 67, 45 (2004)