Cambridge quantum network
| Autor: | Richard V. Penty, Alan Plews, Joo Yeon Cho, H Greißer, Marco Lucamarini, Andrew W. Sharpe, Andrew J. Shields, J.-P. Elbers, Yoshimichi Tanizawa, Wws Tam, Ririka Takahashi, Zhiliang Yuan, Ian H. White, James F. Dynes, Adrian Wonfor, Alex Dixon |
|---|---|
| Přispěvatelé: | Sharpe, A. W. [0000-0003-0378-0885], Lucamarini, M. [0000-0002-7351-4622], Yuan, Z. L. [0000-0001-5276-9151], Dixon, A. R. [0000-0001-7628-4052], Apollo - University of Cambridge Repository, Sharpe, AW [0000-0003-0378-0885], Lucamarini, M [0000-0002-7351-4622], Yuan, ZL [0000-0001-5276-9151], Dixon, AR [0000-0001-7628-4052] |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
639/766/483/481
Computer Networks and Communications Computer science 639/166/987 Data theft Quantum key distribution Encryption 01 natural sciences lcsh:QA75.5-76.95 5108 Quantum Physics 010309 optics Gigabit 0103 physical sciences Broadband Computer Science (miscellaneous) Redundancy (engineering) Quantum information 010306 general physics Quantum network business.industry 639/624/1075/187 article Statistical and Nonlinear Physics lcsh:QC1-999 Computational Theory and Mathematics lcsh:Electronic computers. Computer science business 51 Physical Sciences lcsh:Physics Computer network |
| Zdroj: | npj Quantum Information, Vol 5, Iss 1, Pp 1-8 (2019) |
| ISSN: | 2056-6387 |
| Popis: | Future-proofing current fibre networks with quantum key distribution (QKD) is an attractive approach to combat the ever growing breaches of data theft. To succeed, this approach must offer broadband transport of quantum keys, efficient quantum key delivery and seamless user interaction, all within the existing fibre network. However, quantum networks to date either require dark fibres and/or offer bit rates inadequate for serving a large number of users. Here we report a city wide high-speed metropolitan QKD network—the Cambridge quantum network—operating on fibres already populated with high-bandwidth data traffic. We implement a robust key delivery layer to demonstrate essential network operation, as well as enabling encryption of 100 Gigabit per second (Gbps) simultaneous data traffic with rapidly refreshed quantum keys. Network resilience against link disruption is supported by high-QKD link rates and network link redundancy. We reveal that such a metropolitan network can support tens of thousands of users with key rates in excess of 1 kilobit per second (kbps) per user. Our result hence demonstrates a clear path for implementing quantum security in metropolitan fibre networks. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|