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Long-term performance of the SwissQuantum quantum key distribution network in a field environment

Stucki, D, Legré, M, Buntschu, F, Clausen, B, Felber, N, Gisin, N, Henzen, L, Junod, P, Litzistorf, G, Monbaron, P, Monat, L, Page, J-B, Perroud, D, Ribordy, G, Rochas, A, Robyr, S, Tavares, J, Thew, R, Trinkler, P, Ventura, S, Voirol, R, Walenta, N, Zbinden, H·2011·New Journal of Physics
DOI 10.1088/1367-2630/13/12/123001
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Figures

Figure 1 Map of the SwissQuantum network. Two nodes are in the Geneva city centre and the third one is on the site of CERN in France (the border is in red). The white lines are drawn for illustration: they do not represent the fibres.
Figure 1 Map of the SwissQuantum network. Two nodes are in the Geneva city centre and the third one is on the site of CERN in France (the border is in red). The white lines are drawn for illustration: they do not represent the fibres.CC-BY · From the PDF
Figure 2 Structure of one point-to-point link with the quantum, key management and application layers. The quantum layer generates the secret keys, and pushes them to the management layer. The key management layer processes and stores the keys obtained from the quantum layer and pushes them to any applications which request secret keys (see text for details).
Figure 2 Structure of one point-to-point link with the quantum, key management and application layers. The quantum layer generates the secret keys, and pushes them to the management layer. The key management layer processes and stores the keys obtained from the quantum layer and pushes them to any applications which request secret keys (see text for details).CC-BY · From the PDF
Figure 3 Detailed topology of the SwissQuantum network. All the lines are optical fibres for connecting the different apparatus.
Figure 3 Detailed topology of the SwissQuantum network. All the lines are optical fibres for connecting the different apparatus.CC-BY · From the PDF
Figure 4 Simplified scheme of the plug & play QKD system. On the left (Alice): FM, Faraday mirror; Φ A , Alice's phase modulator; VOA, variable optical attenuator. On the right (Bob): the unbalanced Mach-zehnder interferometer with Bob's phase modulator Φ B ; the laser the circulator and the two single-photon detectors.
Figure 4 Simplified scheme of the plug & play QKD system. On the left (Alice): FM, Faraday mirror; Φ A , Alice's phase modulator; VOA, variable optical attenuator. On the right (Bob): the unbalanced Mach-zehnder interferometer with Bob's phase modulator Φ B ; the laser the circulator and the two single-photon detectors.CC-BY · From the PDF
Figure 5 Key management layer implementation. All the functions in grey boxes whithin the same node are implemented in the same Key Server, or PC.
Figure 5 Key management layer implementation. All the functions in grey boxes whithin the same node are implemented in the same Key Server, or PC.CC-BY · From the PDF
Figure 6 Probability of detection as a function of time for detector 1 of SQ1 (top), SQ2 (middle) and SQ3 (bottom) links. Detector 2 has similar behaviour. (The grey areas are guides to find the perturbations described in the text.)
Figure 6 Probability of detection as a function of time for detector 1 of SQ1 (top), SQ2 (middle) and SQ3 (bottom) links. Detector 2 has similar behaviour. (The grey areas are guides to find the perturbations described in the text.)CC-BY · From the PDF
Figure 7 QBER as a function of time for SQ1 (top), SQ2 (middle) and SQ3 (bottom) links.
Figure 7 QBER as a function of time for SQ1 (top), SQ2 (middle) and SQ3 (bottom) links.CC-BY · From the PDF
Figure 8 Number of 256-bit keys per day. The number of 256-bit keys created per day is larger for the SQ3 link, because the optical attenuation of this link is lower than for the SQ1 and SQ2 links at similar detector efficiencies. The number of keys per day for the SQ1 and SQ2 links are similar.
Figure 8 Number of 256-bit keys per day. The number of 256-bit keys created per day is larger for the SQ3 link, because the optical attenuation of this link is lower than for the SQ1 and SQ2 links at similar detector efficiencies. The number of keys per day for the SQ1 and SQ2 links are similar.CC-BY · From the PDF
Figure 9 Variations of the optical fibre length and temperature in Geneva for go&return path. (a) 21-months measurement. (b) 3 days zoom
Figure 9 Variations of the optical fibre length and temperature in Geneva for go&return path. (a) 21-months measurement. (b) 3 days zoomCC-BY · From the PDF

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Citations

Cites

Research works printed but not linked: 29

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Metadata

Authors
Stucki, D., Legré, M., Buntschu, F., Clausen, B., Felber, N., Gisin, N., Henzen, L., Junod, P., Litzistorf, G., Monbaron, P., Monat, L., Page, J.-B., Perroud, D., Ribordy, G., Rochas, A., Robyr, S., Tavares, J., Thew, R., Trinkler, P., Ventura, S., Voirol, R., Walenta, N., & Zbinden, H.
Venue
New Journal of Physics
Publisher
IOP Publishing
Published
2011-12-01
Volume
13
Issue
12
Pages
123001
ISSN
1367-2630
DOI
10.1088/1367-2630/13/12/123001
Cited by
348
References
3

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