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Improved practical decoy state method in quantum key distribution with parametric down-conversion source
KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.ORCID iD: 0000-0002-2082-9583
KTH, School of Information and Communication Technology (ICT), Optics and Photonics.
2007 (English)In: Europhysics letters, ISSN 0295-5075, E-ISSN 1286-4854, Vol. 79, no 4Article in journal (Refereed) Published
Abstract [en]

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
Keyword [en]
unconditional security
Identifiers
URN: urn:nbn:se:kth:diva-16895DOI: 10.1209/0295-5075/79/40001ISI: 000248980000001Scopus ID: 2-s2.0-79051468891OAI: oai:DiVA.org:kth-16895DiVA: diva2:334938
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Björk, Gunnar

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