Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 56: Poster III
Q 56.62: Poster
Donnerstag, 21. März 2013, 16:00–18:30, Empore Lichthof
Novel paths to phase-space density increase in dipolar atomic gases — Valentin Volchkov, •Jahn Rührig, Matthias Wenzel, Axel Griesmaier, and Tilman Pfau — 5. Physikalisches Institut, Universität Stuttgart, Germany
We present novel paths that we use to increase the phase-space density in a continuously loaded atomic trap. Following the argumentation in [2] we extend our previous work [1] by applying RF radiation during the loading. We discuss how this leads to an increase of the steady state PSD during the continuous process and faster loading. In pulsed operation, we increase the phase-space density by use of the dipolar nature of 52Cr which allows demagnetization cooling [3] and avoids losses connected to evaporative cooling. Starting in an up to now unaccessed temperature regime of T ≈ 100 µ K we aim for the production of large dipolar BECs with high repetition rates. The realization of an active magnetic field stabilization on the level of 100 µ G per axis enables us to circumvent the previously explored limits set by transversal stray fields with respect to the laser used for optical pumping during the demagnetization.
[1]: M. Falkenau, V. V. Volchkov, J. Rührig, A. Griesmaier and T. Pfau, Phys. Rev. Lett. 106, 163002 (2011)
[2]: M. Falkenau, V. V. Volchkov, J. Rührig, H. Gorniaczyk, A. Griesmaier, Phys. Rev. A 85, 023412 (2012)
[3]: M. Fattori, T. Koch, S. Goetz, A. Griesmaier, S. Hensler, J. Stuhler, T. Pfau, Nature Physics 2, 765 (2006)