TY - JOUR KW - pfc AU - Andreas Nunnenkamp AU - Ana Maria Rey AU - Keith Burnett BT - Physical Review A DA - 2011-11 DO - 10.1103/PhysRevA.84.053604 PY - 2011 SE - 053604 EP - 053604 T2 - Physical Review A TI - Superposition states of ultracold bosons in rotating rings with a realistic potential barrier VL - 84 ER -