Dresden 2011 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 29: Ultracold Atoms: Trapping and Cooling 2 (with Q)
A 29.4: Vortrag
Freitag, 18. März 2011, 11:15–11:30, HSZ 02
A Double-Species 2D+MOT for Potassium and Rubidium — •Lucia Duca1, Tracy Li1, Martin Boll1, Jens Philipp Ronzheimer1, Ulrich Schneider1, and Immanuel Bloch1,2 — 1Fakultät für Physik, Ludwig-Maximilians-Universität, 80799 München — 2Max-Planck-Institut für Quantenoptik, 85748 Garching
In recent years there has been a growing interest in the realization of low entropy phases of the Fermi-Hubbard model using ultracold fermions in optical lattices. One of the requirements for achieving e.g. anti-ferromagnetic order is to reduce the initial temperature below T/TF<0.065 [1]. This requires a careful elimination of all heating sources and an optimization of all cooling steps.
Within a new experimental setup that is currently under construction, we use a double-species 2D+MOT [2] for 40K and 87Rb as an atomic source of slow atoms. Compared to the use of dispensers, this pre-cooling stage allows us to operate the 3D MOT at pressures below 10−10 mbar while simultaneously speeding up the experimental cycle and increasing the number of trapped K atoms that will be available for evaporative cooling. We present our 2D+MOT setup and our first experimental results.
[1] Fuchs et.al., arXiv: 1009.2759v1
[2] Dieckmann et.al., PRA 58, 3891 (1998).