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Performance enhancement of a decoy-state quantum key distribution using a conditionally prepared down-conversion source in the Poisson distribution
KTH, School of Information and Communication Technology (ICT), Optics and Photonics.
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
Abstract [en]

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
Keyword [en]
unconditional security, cryptography
Identifiers
URN: urn:nbn:se:kth:diva-16837DOI: 10.1103/PhysRevA.76.014309ISI: 000248486600213OAI: oai:DiVA.org:kth-16837DiVA: diva2:334880
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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