group in front of University College, March 2009
June 2006: Our DFG work in print! Read all about it.... Nature Physics Volume 2, Issue 6, 2006.
The pictures above are absorption images of Potassium 40 atoms at several temperatures. As the temperature is reduced, fermions occupy lower and lower energy levels in the trap, and the cloud sized is reduced. However, at temperatures below the Fermi temperature, lower energy states are completely occupied, and eventually filled up to the Fermi energy (indicted by the red circle above). This quantum degenerate state was acheived by sympathetic cooling in the microfabricated magnetic trap using a reservoir of Rubidium 87 atoms. [more details]
Images of a cloud of Rubidium 87 atoms above and below the Bose-Einstein phase transition. left: 120,000 thermal atoms at 960nK; center: 70,000 atoms at 360nK, just below Tc; right: a nearly pure Bose-Einstein condensate of 45,000 atoms. Images are roughly 1mm by 1mm, and taken after 10ms of free expansion. Height in these plots corresponds to observed atomic density. [more details] 4 Feb 2005: Bose-Fermi mixture on a chip
top row: Rubidium 87 (left) and Potassium 40 (right) in a magneto-optical trap (MOT); bottom row: Rubidium 87 (left) and Potassium 40 (right) in a chip trap. Size bar (center) is 1 mm, and all images are to the same scale 27 Sept 2004: Rubidium atoms on a chip:
May 20, 2004: Magnetic trap coils around the glass cell. March 12, 2004: Rb MOT with full power of Tapered Amplifier above: About a billion rubidium atoms in a MOT (magneto-optical trap)! inset: a similar picture with the room lights out. Look for the orange glowing cloud inside the glass cell. December 17, 2003: First MOT image
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