Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 51: Quantum Gases: Fermions
Q 51.1: Vortrag
Donnerstag, 11. März 2010, 14:00–14:15, E 001
Collective Motion of Polarized Dipolar Fermi Gases in the Hydrodynamic Regime — Aristeu Rosendo Pontes Lima1 and •Axel Pelster2,3 — 1Institut für Theoretische Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — 2Institut für Physik und Astronomie, Karl-Liebknecht-Str. 24 14476 Potsdam, Germany — 3Fachbereich Physik, Universität Duisburg-Essen, Lotharstrasse 1, 47048 Duisburg, Germany
Recently, a seminal STIRAP experiment allowed the creation of 40K87Rb molecules in the rovibrational ground state [1]. In order to describe such a polarized dipolar Fermi gas in the hydrodynamic regime, we work out a variational time-dependent Hartree-Fock approach [2]. With this we calculate dynamical properties of such a system as, for instance, the frequencies of the low-lying excitations and the time-of-flight expansion. We find remarkable effects of a strong dipole-dipole interaction such as anisotropic breathing oscillations in momentum space and a suppression of the aspect-ratio inversion after release of the harmonic trap.
[1] K.-K. Ni et al., Science 322, 231 (2008)
[2] A. R. P. Lima and A. Pelster, arXiv:0908.4583