Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie
Q 57.48: Poster
Donnerstag, 17. März 2011, 16:30–19:30, P1
Semiclassical dynamics of self-organization of atoms in optical cavities — •Stefan Schütz1, Hessam Habibian2, and Giovanna Morigi1 — 1Theoretische Physik, Universität des Saarlandes, D-66041 Saarbrücken, Germany — 2Departament de Física, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain
We theoretically study the formation of self-organized structures of atoms, whose dipolar transition is driven by a laser and also couples to the optical mode of a high-finesse cavity. Self-organization in the cavity field emerges due to the mechanical forces of the cavity photons on the atoms, whereby the cavity field is sustained by the photons scattered by the atoms from the laser and hence depends on the atomic position. The analysis is based on a model, in which the coupled cavity field and atomic dynamics are evaluated by numerically solving the Heisenberg-Langevin equation in the semiclassical limit, namely, when the number of cavity photons is much larger than unity and the atomic momentum is much larger than the photon recoil [1]. Noise sources are here diffusion due to spontaneous decay and photon losses via the resonator. We study the onset of selforganization, focussing in particular on the patterns obtained, when the atoms belong to different species.
[1] P. Domokos et al., J. Phys. B: At. Mol. Opt. Phys. 34 187-198 (2001)