TY - JOUR AU - Yu-Hsiang Cheng AU - Tim Thomay AU - Glenn Solomon AU - Alan Migdall AU - Sergey Polyakov C2 - Optics Express DA - 2015-07-09 00:07:00 DO - https://doi.org/10.1364/OE.23.018671 LA - en PB - Optics Express PY - 2015 TI - Statistically background-free, phase-preserving parametric up-conversion with faint light UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=917762 ER -