Performance enhancement of a decoy-state quantum key distribution using a conditionally prepared down-conversion source in the Poisson distribution
2007 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 76, no 1Article in journal (Refereed) Published
We study the behavior of decoy-state quantum key distribution systems using a conditionally prepared down-conversion source, analyzing such a source running in a mode of operation with either a thermal photon number distribution or a Poisson photon number distribution. By comparing both modes of operations to the three-intensity proposal of Wang , to the one-intensity proposal of Adachi , and to the currently demonstrated faint-laser pulse system, we demonstrate that a down-conversion source in a Poissonian mode of operation can largely enhance the performance of decoy-state quantum key distribution systems. This makes the down-conversion-based decoy-state system an interesting alternative to current technological implementations based on faint-laser pulses.
Place, publisher, year, edition, pages
2007. Vol. 76, no 1
unconditional security, cryptography
IdentifiersURN: urn:nbn:se:kth:diva-16837DOI: 10.1103/PhysRevA.76.014309ISI: 000248486600213OAI: oai:DiVA.org:kth-16837DiVA: diva2:334880
QC 201005252010-08-052010-08-05Bibliographically approved