Improved practical decoy state method in quantum key distribution with parametric down-conversion source
2007 (English)In: Europhysics letters, ISSN 0295-5075, E-ISSN 1286-4854, Vol. 79, no 4Article in journal (Refereed) Published
In this paper, a new decoy state scheme for quantum key distribution with parametric down-conversion source is proposed. We use both three-intensity decoy states and their triggered and nontriggered components to estimate the fraction of single-photon counts and the quantum bit-error rate of single-photon pulses, and then deduce a more accurate value of the key generation rate. The final key rate over transmission distance is simulated, which shows that we can obtain a higher key rate than that of the existing methods, including our own earlier work.
Place, publisher, year, edition, pages
2007. Vol. 79, no 4
IdentifiersURN: urn:nbn:se:kth:diva-16895DOI: 10.1209/0295-5075/79/40001ISI: 000248980000001ScopusID: 2-s2.0-79051468891OAI: oai:DiVA.org:kth-16895DiVA: diva2:334938
QC 201005252010-08-052010-08-05Bibliographically approved