Europhys. Lett, 41 (6), pp. 593-598 (1998)
Velocity selection for ultracold atoms using a micromaser
M. Löffler 1,2, G. M. Meyer 1 and H. Walther 1,2
Max-Planck-Institut für Quantenoptik
Hans-Kopfermann-Str. 1, D-85748 Garching, Germany
2 Sektion Physik, Ludwig-Maximilians-Universität - München, Germany
(received 17 October 1997; accepted in final form 29 January 1998)
PACS. 03.75Dg - Atom and neutron interferometry.
PACS. 42.50Ar - Photon statistics and coherence theory.
PACS. 32.80 - Photon interactions with atoms.
The velocity distribution of ultracold atoms passing through a resonant microwave cavity can narrow by more than an order of magnitude. This velocity selection is due to resonances in the transmission through dressed-state potentials. The proposed device is an atom-optical analog of a Fabry-Pérot resonator and allows for macroscopic coherence lengths.