Berlin 2005 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
Q: Quantenoptik und Photonik
Q 75: Kurzvorträge zum Symposium Mesoskopische Physik ultrakalter Atome (SYUA)
Q 75.4: Vortrag
Mittwoch, 9. März 2005, 16:45–17:00, HU Audimax
Interacting ultracold atoms with disorder confined to one dimension — •M. Thorwart1, V. Peano1, C. Mora1, A. De Martino1, R. Egger1, and R. Graham2 — 1Universität Düsseldorf — 2Universität Duisburg-Essen
We investigate ultracold atom gases with strong interaction which are confined to one dimension. First, a novel nanoscale waveguide is proposed which is based on doubly-clamped suspended multiwall carbon nanotubes. A non-parabolic trapping potential for weak-field seeking atoms is formed. Various estimates on time scales for possible sources of imperfection show that decoherence for this setup is weak. In addition, we show that the non-parabolic confinement leads to novel confinement-induced resonances. Furthermore, we include weak disorder and study one-dimensional bosons with strong repulsive interactions. In analogy to the clean Tonks-Girardeau gas, a Bose-Fermi mapping expresses this problem in terms of disordered non-interacting fermions. Thereby many known exact results apply. We also analyze the so-far unknown bosonic momentum distribution, and comment on the experimental observability of these predictions in ultracold atomic gases.