A quantum trampoline for ultra-cold atoms
Laboratoire Charles Fabry de l'Institut d'Optique, Univ Paris Sud, CNRS, campus polytechnique RD128 91127 Palaiseau, France, EU
2 SYRTE, Observatoire de Paris, CNRS, UPMC - 61 avenue de l'Observatoire, 75014 Paris, France, EU
Corresponding author: firstname.lastname@example.org
Accepted: 3 December 2009
We have observed the interferometric suspension of a free-falling Bose-Einstein condensate periodically submitted to multiple-order diffraction by a vertical 1D standing wave. This scheme permits simultaneously the compensation of gravity and coherent splitting/recombination of the matter waves. It results in high-contrast interference in the number of atoms detected at constant height. For long suspension times, multiple-wave interference is revealed through a sharpening of the fringes. We characterize our atom interferometer and use it to measure the acceleration of gravity.
PACS: 03.75.Dg – Atom and neutron interferometry / 06.30.Gv – Velocity, acceleration, and rotation / 05.60.Gg – Quantum transport
© EPLA, 2010