Düsseldorf 2007 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 20: Atomic Systems in External Fields II
A 20.3: Vortrag
Donnerstag, 22. März 2007, 12:15–12:30, 6G
A control of creating narrow wave packet via atom scattering by a chirped standing light wave — •Maxim A. Efremov1,4, Mikhail V. Fedorov1, Valeri P. Yakovlev2, Markus K. Oberthaler3, and Wolfgang P. Schleich4 — 1General Physics Institute, RAS, Moscow, Russia — 2Moscow Engineering Physics Institute (State University), Moscow, Russia — 3Kirchhoff-Institut für Physik, Universität Heidelberg, Heidelberg, Germany — 4Institut für Quantenphysik, Universität Ulm, Ulm, Germany
We investigate the formation of narrow wave packets in the process of atomic scattering at a resonant standing light wave. One way to provide such a narrowing effect was described theoretically in our earlier works [1] and confirmed successfully by Stützle et al. [2]. Here we suggest and describe an alternative approach: we consider a chopped standing light wave and the intra-atomic excitation due to the adiabatic inversion of levels. Because of the intimate connection between the internal and external variables of atomic motion the adiabatic passing results in the formation of narrow atomic wave packets. The method provides an easy control of three important parameters: (i) the position of creation, (ii) the time interval, during which the absorption process plays a crucial role, and (iii) the final size of the wave packet. All of these parameters are determined only by the chirped pulse parameters.
[1] M.A. Efremov et al., Laser Phys. 13, 995 (2003); M.V. Fedorov et al., JETP 97, 522 (2003).
[2] R. Stützle et al., Phys. Rev. Lett. 95, 110405 (2005).