Konstanz 1998 – wissenschaftliches Programm

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A: Atomphysik

A 12: Poster

A 12.27: Poster

Dienstag, 17. März 1998, 16:00–18:00, PF

Bragg scattering of an atomic beam by a standing laser wave with time periodic amplitude modulation — •A.R. Kolovsky and H.J. Korsch — FB Physik, Universität Kaiserslautern, 67653 Kaiserslautern

We study the scattering of an atomic beam slowly passing through a standing laser wave with an amplitude periodically modulated in time. The intensity of the laser beam and an atomic passage time are assumed to correspond to the semiclassical adiabatic regime [1]. The formal analysis of the problem involves the theory of interacting nonlinear resonances, developed earlier in the field of quantum chaos [2]. Two different diffraction regimes are distinguished – a quasi regular regime, where the atoms are Bragg-like scattered by a primary or secondary nonlinear resonance, and a chaotic regime, where the scattering can be regarded as quasi-random.

[1] A.R. Kolovsky and H.J. Korsch, Phys. Rev. A55, 4433 (1997)

[2] L.E. Reichl: The Transition to Chaos (Springer,1992)