TY - JOUR AU - Boyer, V AU - McCormick, C AU - Arimondo, E AU - Lett, Paul C2 - Physical Review Letters DA - 2007-10-04 00:10:00 LA - en PB - Physical Review Letters PY - 2007 TI - Ultraslow Propagation of Matched Pulses by Four-Wave Mixing in an Atomic Vapor ER -