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29 March 2024
 
  » arxiv » 0710.5131

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Atom interferometry with a weakly-interacting Bose Einstein condensate
Marco Fattori ; Chiara D'Errico ; Giacomo Roati ; Matteo Zaccanti ; Mattia Jona-Lasinio ; Michele Modugno ; Massimo Inguscio ; Giovanni Modugno ;
Date 26 Oct 2007
AbstractWe demonstrate the operation of an atom interferometer based on a weakly interacting Bose-Einstein condensate. We strongly reduce the interaction induced decoherence that usually limits interferometers based on trapped condensates by tuning the s-wave scattering length almost to zero via a magnetic Feshbach resonance. We employ a $^{39}$K condensate trapped in an optical lattice, where Bloch oscillations are forced by gravity. With a control of the scattering length better that 0.1 $a_0$ we achieve coherence times of several hundreds of ms. The micrometric sizes of the atomic sample make our sensor an ideal candidate for measuring forces with high spatial resolution. Our technique can be in principle extended to other measurement schemes opening new possibilities in the field of trapped atom interferometry.
Source arXiv, 0710.5131
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