Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 56: Poster III
Q 56.54: Poster
Donnerstag, 21. März 2013, 16:00–18:30, Empore Lichthof
Semiclassical theory for laser-driven atoms in optical cavities — •Stefan Schütz1, Hessam Habibian1,2, and Giovanna Morigi1 — 1Theoretische Physik, Universität des Saarlandes, D-66041 Saarbrücken, Germany — 2Grup d’Óptica, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Barcelona, 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. We consider the semiclassical model in [1], which is used when the laser is well above the self-organization threshold, and identify the limits of validity. We then extend the theoretical description to a Fokker-Planck equation which is valid below threshold, when the intracavity photon number is low. In this regime we analyze the dynamics of cavity cooling, and determine the final temperatures and cooling rates.
[1] P. Domokos et al., J.Phys. B: At. Mol. Opt. Phys. 34 187-198 (2001)
[2] J.K.Asbóth, P. Domokos, H. Ritsch, and A. Vukics, Phys. Rev. A 72, 053417 (2005)