TY - JOUR AU - J. Cirac AU - Peter Zoller BT - Physical Review A DA - Jan-10-1994 DO - 10.1103/PhysRevA.50.R2799 PY - 1994 SP - R2799 EP - R2802 T2 - Physical Review A TI - Preparation of macroscopic superpositions in many-atom systems VL - 50 SN - 1050-2947 ER -