Our paper on twin-atom beams has just been published in Nature Physics:

Twin-atom beams

Robert Bücker, Julian Grond, Stephanie Manz, Tarik Berrada, Thomas Betz, Christian Koller, Ulrich Hohenester, Thorsten Schumm, Aurélien Perrin & Jörg Schmiedmayer

Nature Physics 7 (2011) 608-611 or preprint on arXiv.

Press release at Vienna University of Technology