Control of interaction-induced dephasing of Bloch oscillations.

@article{Gustavsson2008ControlOI,
  title={Control of interaction-induced dephasing of Bloch oscillations.},
  author={Mats Gustavsson and Elmar Haller and Manfred J. Mark and Johann G. Danzl and G Rojas-Kopeinig and H-C N{\"a}gerl},
  journal={Physical review letters},
  year={2008},
  volume={100 8},
  pages={080404}
}
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… CONTINUE READING

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Note that for the quasi - one - dimensional case the interaction constant in Eq . ( 33 ) is proportional to √ a , see [ 20 ] . [ 20 ] A . Smerzi

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