TY - JOUR AU - Changhyun Ryu AU - Mikkel Andersen AU - Pierre Clade AU - Vasant Natarajan AU - Kristian Helmerson AU - William D. Phillips C2 - Physical Review Letters DA - 2008-10-16 14:10:14 LA - en PB - Physical Review Letters PY - 2008 TI - Observation of Persistent Flow of a Bose-Einstein Condensate in a Toroidal Trap ER -