Journal
NATURE PHOTONICS
Volume 9, Issue 6, Pages 397-+Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHOTON.2015.83
Keywords
-
Categories
Funding
- Engineering and Physical Sciences Research Council via the 'UK Quantum Communications HUB' [EP/M013472/1, EP/L011298/1, EP/J00796X/1]
- Leverhulme Trust
- H.C. Orsted postdoctoral programme
- EPSRC [EP/J00796X/1, EP/M013472/1, EP/L011298/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M013472/1] Funding Source: researchfish
Ask authors/readers for more resources
Quantum cryptography achieves a formidable task-the remote distribution of secret keys by exploiting the fundamental laws of physics. Quantum cryptography is now headed towards solving the practical problem of constructing scalable and secure quantum networks. A significant step in this direction has been the introduction of measurement-device independence, where the secret key between two parties is established by the measurement of an untrusted relay. Unfortunately, although qubit-implemented protocols can reach long distances, their key rates are typically very low, unsuitable for the demands of a metropolitan network. Here we show, theoretically and experimentally, that a solution can come from the use of continuous-variable systems. We design a coherent-state network protocol able to achieve remarkably high key rates at metropolitan distances, in fact three orders of magnitude higher than those currently achieved. Our protocol could be employed to build high-rate quantum networks where devices securely connect to nearby access points or proxy servers.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available