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Entanglement distribution over a 96-km-long submarine optical fiber
- Source :
- Proceedings of the National Academy of Sciences of the United States of America, Wengerowsky, S, Joshi, S K, Steinlechner, F, Zichi, J R, Dobrovolskiy, S M, van der Molen, R, Los, J W N, Zwiller, V, Versteegh, M A M, Mura, A, Calonico, D, Inguscio, M, Hübel, H, Bo, L, Scheidl, T, Zeilinger, A, Xuereb, A & Ursin, R 2019, ' Entanglement distribution over a 96-km-long submarine optical fiber ', Proceedings of the National Academy of Sciences of the United States of America, vol. 116, no. 14, pp. 6684-6688 . https://doi.org/10.1073/pnas.1818752116
- Publication Year :
- 2019
- Publisher :
- Proceedings of the National Academy of Sciences, 2019.
-
Abstract
- Quantum entanglement is one of the most extraordinary effects in quantum physics, with many applications in the emerging field of quantum information science. In particular, it provides the foundation for quantum key distribution (QKD), which promises a conceptual leap in information security. Entanglement-based QKD holds great promise for future applications owing to the possibility of device-independent security and the potential of establishing global-scale quantum repeater networks. While other approaches to QKD have already reached the level of maturity required for operation in absence of typical laboratory infrastructure, comparable field demonstrations of entanglement-based QKD have not been performed so far. Here, we report on the successful distribution of polarization-entangled photon pairs between Malta and Sicily over 96 km of submarine optical telecommunications fiber. We observe around 257 photon pairs per second, with a polarization visibility above 90%. Our results show that QKD based on polarization entanglement is now indeed viable in long-distance fiber links. This field demonstration marks the longest-distance distribution of entanglement in a deployed telecommunications network and demonstrates an international submarine quantum communication channel. This opens up myriad possibilities for future experiments and technological applications using existing infrastructure.<br />peer-reviewed
- Subjects :
- Photon
Optical fiber
quantum key distribution
Computer science
Quantum entanglement
Fiber optics
quantum entanglement
Quantum key distribution
01 natural sciences
010305 fluids & plasmas
law.invention
QETLabs
Quantum cryptography
Polarization-entangled photons
law
0103 physical sciences
Optical fibers
010306 general physics
Quantum information science
Quantum
Computer Science::Cryptography and Security
Multidisciplinary
business.industry
Photons -- Polarization
Physics
Telecommunication systems
Electrical engineering
polarization-entangled photons
Quantum Physics
Telecommunications network
Cables, Submarine
Physical Sciences
quantum cryptography
business
Subjects
Details
- ISSN :
- 10916490 and 00278424
- Volume :
- 116
- Database :
- OpenAIRE
- Journal :
- Proceedings of the National Academy of Sciences
- Accession number :
- edsair.doi.dedup.....a60f3399e455508c215958c4f799d789