A quantum trampoline for ultra-cold atoms
Martin Robert De Saint Vincent (LCFIO), Jean-Philippe Brantut (LCFIO),, Christian J. Bord\'e (LPL, SYRTE), Alain Aspect (LCFIO), Thomas Bourdel, (LCFIO), Philippe Bouyer (LCFIO)
TL;DR
This paper demonstrates a quantum trampoline for ultra-cold atoms using Bose-Einstein condensates, enabling precise gravity measurements through matter-wave interference.
Contribution
It introduces a novel interferometric scheme that suspends and manipulates ultra-cold atoms for high-precision measurements.
Findings
High contrast interference observed in Bose-Einstein condensates
Multiple-wave interference enhances fringe sharpness over time
Effective measurement of gravitational acceleration
Abstract
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. The various diffracted matter waves recombine coherently, resulting 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 use this scheme to measure the acceleration of gravity.
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Taxonomy
TopicsCold Atom Physics and Bose-Einstein Condensates · Quantum Information and Cryptography · Quantum Mechanics and Applications