Dresden 2011 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 27: ISS Transport and Localization of Interacting Bosons I
DY 27.6: Talk
Wednesday, March 16, 2011, 17:45–18:00, HSZ 02
Anderson orthogonality catastrophe in ultracold quantum gases — •Daniel Kotik1, Martina Hentschel1, and Walter Strunz2 — 1Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Straße 83, 01187 Dresden — 2Institut für Theoretische Physik, TU Dresden, 01062 Dresden
Ultracold quantum gases have attracted a lot of attention in recent years, not least due to their exquisite experimental control and the resulting versatile possibilities to manipulate them.
Here, we study impurity potentials in ultracold bosonic quantum gases and specifically in their Bose-Einstein condensed phase, that result, e.g., from unavoidable defects contained in the material or from deliberately placed perturbations. Our emphasis will be on spatio-temporal perturbations that are suddenly switched-on and spatially localized, as can be realized by switching on an additional laser beam. The many-body response of the quantum gas to this impurity potential is studied numerically and analytically.
We will pay particular attention to the consideration of the bosonic analogue known from solid state theory as Anderson orthogonality catastrophe.