Heidelberg 2015 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster: Quantum Optics and Photonics III

Q 62.19: Poster

Donnerstag, 26. März 2015, 17:00–19:00, C/Foyer

Anomalous diffusion of a single atom in a lattice in presence of an external force — •Farina Kindermann, Michael Bauer, Felix Schmidt, Tobias Lausch, Daniel Mayer, and Artur Widera — TU Kaiserslautern, FB Physik, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern

The dynamics of particle systems is often modelled by a classical random walk, leading to Gaussian statistics. But in the last decades it has been shown that systems exist, where rare but often long ranged events dominate the diffusion dynamics. These systems are described by heavy-tailed distributions such as Levy statistics. Here we present a setup, where a single neutral atom performs a random walk in a 1D lattice, when it is driven by an optical molasses and hence undergoes frequently photon scattering. We analyze the single step length distribution and the diffusion coefficient, which can both show a significant deviation from the expected Gaussian distribution.