Image Gallery




 

Image Gallery on High-Temperature Superfluidity

Photo credit for all images: Andre Schirotzek (MIT)

Vortex 		Selection The pictures show vortex lattices on the BEC-side of the resonance (left), in the unitary regime on resonance (middle) and on the BCS-side of the resonance (right).
(high resolution version)
Vortices vs Magnetic Field Vortices in a strongly interacting gas of fermionic atoms on the BEC- and the BCS-side of the Feshbach resonance. At the given field, the cloud of lithium atoms was stirred for 500 ms followed by an equilibration time of 500 ms. After 2ms of ballistic expansion, the magnetic field was ramped below the Feshbach resonance to 735G for imaging. The magnetic fields were 740G (a), 766G (b), 792G (c), 812G (d), 833G (e), 843G (f), 853G (g) and 863G (h). The field of view of each image is 880mm · 880mm.
(high resolution version)
Cartoon: Experimental Setup A condensate of Fermion pairs (red) is trapped in the waist of a focussed Laser beam (pink). Two additional Laser beams (green) rotate around the edges to stir the condensate. Current-carrying coils (blue) generate the magnetic field used for axial confinement and to tune the interaction strength by means of a Feshbach resonance. After releasing the atomic cloud from the electromagnetic trap, the cloud expands ballistically and inverts its aspect ratio. Resonant absorption imaging yields a density profile of the atomic cloud containing vortices.
(high resolution version)
Na vs Li Vortices in Gases: Shown is a Vortex pattern in bosonic Sodium atoms (green cartoon) in a magnetic trap, Vortices in tightly bound Lithium molecules (red-blue cartoon) and a vortex lattice in loosely bound Fermion pairs created on the "BCS-side" of a Feshbach resonance. The background shows a classical vortex (Hurricane Isabel in summer 2003, NASA image ISS007E14887).
(high resolution version)


Our Hardware

Experiment Table The experimental table with the optical setup for Magneto-optical Trap (MOT) and Slower in the foreground.
(high resolution version)
MOT Optical setup for Magneto-Optical trap (MOT)
(high resolution version)
Lithium Laser The Lithium Laser system
(high resolution version)
oven The two-species oven
(high resolution version)
oven top left to bottom right:
Andre Schirotzek (graduate student), Martin Zwierlein (graduate student), Christian Schunck (graduate student), Wolfgang Ketterle (principal investigator)
(high resolution version)