Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 51: Quantum Gases: Fermions
Q 51.8: Vortrag
Donnerstag, 11. März 2010, 15:45–16:00, E 001
Feshbach resonances in Fermi mixtures of ultracold 40K — •Antje Ludewig1, Tobias Tiecke1, Steve Gensemer1,2, Sebastian Kraft1,3, and Jook Walraven1 — 1Van der Waals-Zeeman Institute of the University of Amsterdam, The Netherlands — 2Ethel Walker School, Simsbury, United States — 3PTB, Braunschweig
We report on the measurement of Feshbach resonances in ultracold Fermi-Fermi mixtures of 40K in an optical dipole trap (ODT). In the same trap we have realized degenerate spin mixtures of 106 40K atoms at T=0.3(1)TF. The cold atoms are loaded from a two dimensional magneto optical trap (MOT). After evaporation in an optically plugged magnetic trap the 40K atoms are loaded into optical tweezers and transported over a distance of 21.5cm into a science cell. Using microwave radiation and resonant light we prepare non degenerate mixtures of 2* 105 40K atoms in various Zeeman states. 40K has a rich hyperfine structure (F=9/2) and many Feshbach resonances involving the different states are expected. We measure these resonances using magnetic field coils designed for high homogeneity. We report on our progress exploring Feshbach resonances in 40K and locating resonances favourable for the investigation of many body states.