Berlin 2005 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 64: Quantengase IV

Q 64.5: Vortrag

Mittwoch, 9. März 2005, 12:00–12:15, HU Kinosaal

Resonance scattering from a trapped bosonic gas — •Reinhold Walser, Gerrit Nandi, Michael Grupp, and Endre Kajari — Abteilung für Quantenphysik, Universität Ulm

Discrete bound states imbedded in the scattering continuum are a fascinating aspect of quantum mechanics. Feshbach resonances in nuclear physics or Fano-profiles in atomic physics are beautiful realizations of this phenomenon. In particular, Feshbach resonances in binary atomic collision physics have gained tremendous importance recently for degenerate atomic gases, as it becomes possible to actively control the mutual interaction between particles.

In the present contribution, we will examine the analogous physical effect, however not on the atomic scale, but on a mesoscopic scale of a condensed, two-component bosonic gas in a quasi one-dimensional trap. In particular, we will discuss the scattering of a weak perturbation from a ground-state condensate.