Lo Piparo, N and Razavi, M (2014) Long-distance quantum key distribution with imperfect devices. In: AIP Conference Proceedings. Eleventh International Conference on Quantum Communication, Measurement and Computation (QCMC), 30 Jul - 03 Aug 2012, Vienna, Austria. American Institute of Physics (AIP) , pp. 122-124. ISBN 978-0-7354-1272-9
Abstract
Quantum key distribution over probabilistic quantum repeaters is addressed. We compare, under practical assumptions, two such schemes in terms of their secure key generation rate per memory, R QKD . The two schemes under investigation are the one proposed by Duan et al. in [Nat. 414, 413 (2001)] and that of Sangouard et al. proposed in [Phys. Rev. A 76, 050301 (2007)]. We consider various sources of imperfections in the latter protocol, such as a nonzero double-photon probability for the source, dark count per pulse, channel loss and inefficiencies in photodetectors and memories, to find the rate for different nesting levels. We determine the maximum value of the double-photon probability beyond which it is not possible to share a secret key anymore. We find the crossover distance for up to three nesting levels. We finally compare the two protocols.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2014 AIP Publishing LLC. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Lo Piparo, N and Razavi, M (2014) Long-distance quantum key distribution with imperfect devices. In: AIP Conference Proceedings. Eleventh International Conference on Quantum Communication, Measurement and Computation (QCMC), 30 Jul - 03 Aug 2012, Vienna, Austria. American Institute of Physics (AIP) , pp. 122-124., and may be found at http://dx.doi.org/10.1063/1.4903112. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | Quantum key distribution; Quantum repeaters; Secret key generation rate |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Institute of Communication & Power Networks (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 18 Jul 2016 09:36 |
Last Modified: | 18 Jul 2016 09:36 |
Published Version: | http://dx.doi.org/10.1063/1.4903112 |
Status: | Published |
Publisher: | American Institute of Physics (AIP) |
Identification Number: | 10.1063/1.4903112 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:85037 |