TY - JOUR PB - American Physical Society ID - 10.1103/Physics.5.42 TI - Photon Pairs Get More Commercial JF - Physics JA - Physics J1 - PHYSICS VL - 5 IS - SP - 42 EP - PY - 2012/04/13/ UR - http://link.aps.org/doi/10.1103/Physics.5.42 A1 - Castelvecchi, Davide ER -