Dresden 2011 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 25: Matter Wave Optics
Q 25.4: Talk
Wednesday, March 16, 2011, 11:15–11:30, BAR Schön
Chip-based Bragg interferometry with Bose-Einstein condensates in microgravity — •Markus Krutzik1, Achim Peters1, and the QUANTUS Team1,2,3,4,5,6,7,8,9 — 1Institut für Physik, HU Berlin — 2Institut für Quantenoptik, LU Hannover — 3Institut für Laserphysik, Uni Hamburg — 4ZARM, Uni Bremen — 5Institut für Quantenphysik, Uni Ulm — 6MPQ, München — 7Institut für angewandte Physik, TU Darmstadt — 8Midlands Ultracold Atom Research Centre, University of Birmingham, UK — 9FBH, Berlin
The successful observation of
Bose-Einstein-Condensation in microgravity was an important result
towards operating dilute quantum gas experiments under extreme
conditions (van Zoest et al., Science 328 2010). In this
talk we report on atom-optical experiments with a BEC produced in
this apparatus, performed on ground as well as in free fall. The
coherent manipulation of the ensemble is realized with stimulated
Bragg diffraction as a splitting and recombination process. Using a
simple interferometer composed of two Bragg pulses we investigated
the phase-coherence of the ensemble by oberserving the spatial
fringe pattern with free evolution times up to 500ms. In the near
future we intend to realize multiphoton Mach-Zehnder topologies to
achieve extremely large distances between the diffracted wave
packets and even longer timescales within the sequence.
The QUANTUS project is supported by the German Space Agency DLR with funds provided by the Federal Ministry of Economics and Technology (BMWi) under grant number DLR 50 WM 1131-1137.