title: Absolute detector calibration using twin beams.
abstract: A method for the determination of absolute quantum detection efficiency is suggested based on the measurement of photocount statistics of twin beams. The measured histograms of joint signal-idler photocount statistics allow us to eliminate an additional noise superimposed on an ideal calibration field composed of only photon pairs. This makes the method superior above other approaches presently used. Twin beams are described using a paired variant of quantum superposition of signal and noise.
authors: RCPTM, Joint Laboratory of Optics of Palacký University and Institute of Physics of Academy of Sciences of the Czech Republic, Faculty of Science, Palacký University, 17. listopadu 12, 77146 Olomouc, Czech Republic. perinaj@prfnw.upol.cz
authors: Jan
authors: J
authors: Peřina
authors: Ondřej
authors: O
authors: Haderka
authors: Václav
authors: V
authors: Michálek
authors: Martin
authors: M
authors: Hamar