Our paper appeared in PRL:

Two-point phase correlations of a one-dimensional bosonic Josephson junction
Thomas Betz, Stephanie Manz, Robert Bücker, Tarik Berrada, Christian Koller,
Georgy Kazakov,Igor E. Mazets, Hans-Peter Stimming, Aurelien Perrin,
Thorsten Schumm, Jörg Schmiedmayer
PRL 106, 020407 (2011) or arXiv 1010.5989