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Long-distance quantum-key-distribution using concatenated entanglement swapping with practical resources
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Paper Abstract

We present our approach for sharing photons and assessing resultant four-photon visibility between two distant parties using concatenated entanglement swapping. In addition we determine the corresponding key generation rate and the quantum bit-error rate. Our model is based on practical limitations of resources, including multipair parametric down-conversion sources, inefficient detectors with dark counts and lossy channels. Through this approach, we have found that a trade-off is needed between experimental run-time, pair-production rate and detector efficiency. Concatenated entanglement swapping enables huge distances for quantum key-distribution but at the expense of low key generation rate.

Paper Details

Date Published: 13 September 2016
PDF: 10 pages
Proc. SPIE 9980, Quantum Communications and Quantum Imaging XIV, 99800R (13 September 2016); doi: 10.1117/12.2237870
Show Author Affiliations
Aeysha Khalique, National Univ. of Sciences and Technology (Pakistan)
Univ. of Science and Technology of China (China)
Barry C. Sanders, Univ. of Science and Technology of China (China)
Univ. of Calgary (Canada)
Canadian Institute for Advanced Research (Canada)

Published in SPIE Proceedings Vol. 9980:
Quantum Communications and Quantum Imaging XIV
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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