Simple performance evaluation of pulsed spontaneous parametric down-conversion sources for quantum communications.
Fast characterization of pulsed spontaneous parametric down conversion (SPDC) sources is important for applications in quantum information processing and communications. We propose a simple method to perform this task, which only requires measuring the counts on the two output channels and the coincidences between them, as well as modeling the filter used to reduce the source bandwidth. The proposed method is experimentally tested and used for a complete evaluation of SPDC sources (pair emission probability, total losses, and fidelity) of various bandwidths. This method can find applications in the setting up of SPDC sources and in the continuous verification of the quality of quantum communication links.
Laboratoire Traitement et Communication de l'Information, Télécom ParisTech, CNRS, Institut Télécom, Paris, France.
Jean-Loup
JL
Smirr
Sylvain
S
Guilbaud
Joe
J
Ghalbouni
Robert
R
Frey
Eleni
E
Diamanti
Romain
R
Alléaume
Isabelle
I
Zaquine
D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D055096:Optical Devices; D011789:Quantum Theory; D012031:Refractometry / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*