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Q: Quantenoptik und Photonik
Q 49: Stark korrelierte atomare Systeme
Q 49.4: Vortrag
Dienstag, 8. März 2005, 17:45–18:00, HU Kinosaal
Charge and spin dynamics of interacting Fermions in a one dimensional harmonic trap — •Wolfgang Häusler1, Lars Kecke2, and Hermann Grabert2 — 1Institut für Theoretische Physik, Universität Erlangen, Staudtstr. 7, D-91058 Erlangen, Germany — 2Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str. 3, D-79104 Freiburg, Germany
We study an atomic Fermi gas interacting through repulsive contact forces in a one dimensional harmonic trap. Bethe-Ansatz solutions lead to an inhomogeneous Tomonaga-Luttinger model for the low energy excitations. The equations of motion for charge and spin density waves are analyzed both near the trap center and near the trap edges. While the center shows conventional spin-charge separation the edges cause a giant increase of the separation between these modes.