Coherence length of an elongated condensate

A study by matter-wave interferometry
  • M. HugbartEmail author
  • J. A. Retter
  • F. Gerbier
  • A. F. Varón
  • S. Richard
  • J. H. Thywissen
  • D. Clément
  • P. Bouyer
  • A. Aspect
Atom Chips and Fundamental Physics


We measure the spatial correlation function of Bose-Einstein condensates in the cross-over region between phase-coherent and strongly phase-fluctuating condensates. We observe the continuous path from a Gaussian-like shape to an exponential-like shape characteristic of one-dimensional phase-fluctuations. The width of the spatial correlation function as a function of the temperature shows that the condensate coherence length undergoes no sharp transition between these two regimes.  


Spectroscopy Neural Network State Physics Coherence Correlation Function 
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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Authors and Affiliations

  • M. Hugbart
    • 1
    Email author
  • J. A. Retter
    • 1
  • F. Gerbier
    • 2
  • A. F. Varón
    • 1
  • S. Richard
    • 3
  • J. H. Thywissen
    • 4
  • D. Clément
    • 1
  • P. Bouyer
    • 1
  • A. Aspect
    • 1
  1. 1.Laboratoire Charles Fabry de l’Institut d’OptiqueOrsay CedexFrance
  2. 2.Institut für Physik, Johannes Gutenberg UniversitätMainzGermany
  3. 3.THALES Research & TechnologyOrsay CedexFrance
  4. 4.Department of PhysicsUniversity of TorontoTorontoCanada

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