Preprint article ยท Conference paper
Quantum cryptography with an ideal local relay
We consider two remote parties connected to a relay by two quantum channels. To generate a secret key, they transmit coherent states to the relay, where the states are subject to a continuous-variable (CV) Bell detection. We study the ideal case where Alice's channel is lossless, i.e., the relay is locally in her lab and the Bell detection is perfomed with unit efficiency.
This configuration allows us to explore the optimal performances achievable by CV measurement-device-independent quantum key distribution. This corresponds to the limit of a trusted local relay, where the detection loss can be re-scaled. Our theoretical analysis is confirmed by an experimental simulation where 10-4 secret bits per use can potentially be distributed at 170km assuming ideal reconciliation.
Language: | English |
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Publisher: | SPIE - International Society for Optical Engineering |
Year: | 2015 |
Pages: | 96480Z-96480Z-4 |
Proceedings: | Electro-Optical and Infrared Systems: Technology and Applications XII; and Quantum Information Science and Technology |
Series: | Proceedings of Spie - the International Society for Optical Engineering |
ISBN: | 1628418583 and 9781628418583 |
ISSN: | 1996756x and 0277786x |
Types: | Preprint article and Conference paper |
DOI: | 10.1117/12.2202662 |
ORCIDs: | Gehring, Tobias , Jacobsen, Christian Scheffmann and Andersen, Ulrik Lund |