Coherence length of an elongated condensate - A study by matter-wave interferometry M. Hugbart, J. A. Retter, F. Gerbier, A. F. Varón, S. Richard, J. H. Thywissen, D. Clément, P. Bouyer and A. Aspect Eur. Phys. J. D, 35 1 (2005) 155-163 Published online: 03 May 2005 DOI: 10.1140/epjd/e2005-00056-2