TY - JOUR AU - Lu Deng AU - Cuiping Lu AU - Weiping Zhang AU - Chunhua Yuan C2 - Physical Review A DA - 2009-03-05 DO - https://doi.org/10.1103/PhysRevA.79.033804 LA - en M1 - 79 PB - Physical Review A PY - 2009 TI - Generating correlated (2+1)-photon pairs in an active-Raman-gain medium ER -