Hannover 2010 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 23: Poster II
A 23.29: Poster
Donnerstag, 11. März 2010, 16:30–19:00, Lichthof
Cold gases under influence of spatiotemporal localized pertubations — •Daniel Kotik1,2, Martina Hentschel2, and Walter Strunz1 — 1Institut für Theoretische Physik, TU Dresden, 01062 Dresden — 2Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Straße 83, 01187 Dresden
Cold atomic gases have attracted a lot of attention in recent years, not least due to the manifold possibilities to manipulate such systems in experiments. On the other hand, many-body effects have been a long research interest in solid-state physics.
Here, we merge both topics and theoretically study the response of dilute, cold atomic gases in a harmonic trap to a spatially localized, sudden perturbation as can be realized by switching on a laser beam. First, we investigate the effect of perturbations of varying strengths, time dependence, and spatial extent in pure bosonic condensates.
We compare this situation with the fermionic case where the many-body response to a sudden, localized potential is known as Anderson orthogonality catastrophe. Furthermore, we study the time-dependence of the perturbation process and will report recent results from simulations on the time evolution in real space.