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A: Fachverband Atomphysik
A 2: Quantum gases I (jointly with Q)
A 2.2: Group Report
Monday, March 10, 2008, 14:30–15:00, 1A
Bose-Einstein condensates coupled to solid state systems on an atom chip — •Philipp Treutlein1,2, David Hunger1,2, Stephan Camerer1,2, Pascal Böhi1,2, Max Riedel1,2, Johannes Hoffrogge1,2, Theodor W. Hänsch1,2, Daniel König2, Jörg P. Kotthaus2, and Jakob Reichel3 — 1Max-Planck-Institut für Quantenoptik, Garching — 2Fakultät für Physik, Ludwig-Maximilians-Universität München — 3LKB, Ecole Normale Superieure, Paris
We present the status of two experiments which explore the interaction of atoms with micro- and nanofabricated solid state systems on a chip.
The first experiment aims at coupling a BEC to the mechanical oscillations of a nanoscale cantilever with a magnetic tip. Theoretical investigations of the magnetic coupling mechanism show that the atoms can be used as a sensitive probe for the cantilever dynamics. At low temperatures, the backaction of the atoms onto the cantilever is significant and the system represents a mechanical analog of cavity QED in the strong coupling regime [P. Treutlein et al., Phys. Rev. Lett. 99, 140403 (2007)].
In the second experiment, the solid state system is a miniaturized microwave guiding structure, which can be used to manipulate BECs. Through microwave dressing of hyperfine states, state-selective double-well potentials can be created. Such potentials have applications in quantum information processing, the study of Josephson effects, and could be used to entangle atoms via state-selective collisions [P. Treutlein et al., Phys. Rev. A 74, 022312 (2006)].