Control of interaction-induced dephasing of Bloch oscillations

M. Gustavsson, Elmar Haller, M.J. Mark, J.G. Danzl, G. Rojas-Kopeinig, H.-C. Nägerl

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180 Citations (Scopus)


We report on the control of interaction-induced dephasing of Bloch oscillations for an atomic Bose-Einstein condensate in an optical lattice. We quantify the dephasing in terms of the width of the quasimomentum distribution and measure its dependence on time for different interaction strengths which we control by means of a Feshbach resonance. For minimal interaction, the dephasing time is increased from a few to more than 20 thousand Bloch oscillation periods, allowing us to realize a BEC-based atom interferometer in the noninteracting limit.
Original languageEnglish
Article number080404
Number of pages4
JournalPhysical Review Letters
Issue number8
Publication statusPublished - 28 Feb 2008


  • Bloch oscillations
  • Bose-Einstein condensate
  • atom interferometer


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