TY - JOUR AU - Cheng, Yu-Hsiang AU - Thomay, Tim AU - Solomon, Glenn AU - Migdall, Alan AU - Polyakov, Sergey 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 -