13 September 2016 Long-distance quantum-key-distribution using concatenated entanglement swapping with practical resources
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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.
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Aeysha Khalique, Aeysha Khalique, Barry C. Sanders, Barry C. Sanders, "Long-distance quantum-key-distribution using concatenated entanglement swapping with practical resources", Proc. SPIE 9980, Quantum Communications and Quantum Imaging XIV, 99800R (13 September 2016); doi: 10.1117/12.2237870; https://doi.org/10.1117/12.2237870
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