Düsseldorf 2007 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 59: Quanteneffekte (Lichtstreuung II)

Q 59.6: Talk

Thursday, March 22, 2007, 15:15–15:30, 5E

Multiple photon scattering in resonant atomic media — •Tobias Kerscher and Cord Müller — Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth

We investigate multiple photon scattering in a dense cloud of resonant atoms by means of a self-consistent perturbation theory. The atoms are assumed to be identical two-level systems. In this medium the self-energy Σ determines the photonic dispersion relation.

We present a diagrammatic calculation of Σ to leading order in atomic density and compare it to a coherent potential approximation (CPA). The dressed propagation of light in turn influences the natural line width Γ of the atomic resonance. The near-resonance behaviour of Γ will be discussed.