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Entanglement distribution over a 96-km-long submarine optical fiber

Wengerowsky, Soeren (författare)
Austrian Acad Sci, Inst Quantum Opt & Quantum Informat Vienna, A-1090 Vienna, Austria.;Vienna Ctr Quantum Sci & Technol, A-1090 Vienna, Austria.
Joshi, Siddarth Koduru (författare)
Austrian Acad Sci, Inst Quantum Opt & Quantum Informat Vienna, A-1090 Vienna, Austria.;Vienna Ctr Quantum Sci & Technol, A-1090 Vienna, Austria.;HH Wills Phys Lab, Quantum Engn Technol Labs, Bristol BS8 1FD, Avon, England.;Univ Bristol, Dept Elect & Elect Engn, Bristol BS8 1UB, Avon, England.
Steinlechner, Fabian (författare)
Austrian Acad Sci, Inst Quantum Opt & Quantum Informat Vienna, A-1090 Vienna, Austria.;Vienna Ctr Quantum Sci & Technol, A-1090 Vienna, Austria.;Fraunhofer Inst Appl Opt & Precis Engn IOF Jena, D-07745 Jena, Germany.;Friedrich Schiller Univ Jena, Abbe Ctr Photon, D-07745 Jena, Germany.
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Zichi, Julien (författare)
KTH,Kvant- och biofotonik,Single Quantum BV, NL-2628 CJ Delft, Netherlands.
Dobrovolskiy, Sergiy M. (författare)
Single Quantum BV, NL-2628 CJ Delft, Netherlands.
van der Molen, Rene (författare)
Single Quantum BV, NL-2628 CJ Delft, Netherlands.
Los, Johannes W. N. (författare)
Single Quantum BV, NL-2628 CJ Delft, Netherlands.
Zwiller, Val (författare)
KTH,Kvant- och biofotonik,Single Quantum BV, NL-2628 CJ Delft, Netherlands.
Versteegh, Marijn A. M. (författare)
KTH,Kvant- och biofotonik
Mura, Alberto (författare)
Ist Nazl Ric Metrol, I-10135 Turin, Italy.
Calonico, Davide (författare)
Ist Nazl Ric Metrol, I-10135 Turin, Italy.
Inguscio, Massimo (författare)
European Lab Nonlinear Spect LENS, I-50019 Sesto Fiorentino, Italy.;Univ Florence, Dept Phys & Astron, I-50019 Sesto Fiorentino, Italy.;CNR, I-00185 Rome, Italy.
Huebel, Hannes (författare)
Austrian Inst Technol, Ctr Digital Safety & Secur, A-1210 Vienna, Austria.
Bo, Liu (författare)
Austrian Acad Sci, Inst Quantum Opt & Quantum Informat Vienna, A-1090 Vienna, Austria.;Vienna Ctr Quantum Sci & Technol, A-1090 Vienna, Austria.;Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Hunan, Peoples R China.
Scheidl, Thomas (författare)
Austrian Acad Sci, Inst Quantum Opt & Quantum Informat Vienna, A-1090 Vienna, Austria.;Univ Vienna, Quantum Opt Quantum Nanophys & Quantum Informat, A-1090 Vienna, Austria.
Zeilinger, Anton (författare)
Austrian Acad Sci, Inst Quantum Opt & Quantum Informat Vienna, A-1090 Vienna, Austria.;Univ Vienna, Quantum Opt Quantum Nanophys & Quantum Informat, A-1090 Vienna, Austria.
Xuereb, Andre (författare)
Univ Malta, Dept Phys, MSD-2080 Msida, Malta.
Ursin, Rupert (författare)
Austrian Acad Sci, Inst Quantum Opt & Quantum Informat Vienna, A-1090 Vienna, Austria.;Vienna Ctr Quantum Sci & Technol, A-1090 Vienna, Austria.
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Austrian Acad Sci, Inst Quantum Opt & Quantum Informat Vienna, A-1090 Vienna, Austria;Vienna Ctr Quantum Sci & Technol, A-1090 Vienna, Austria. Austrian Acad Sci, Inst Quantum Opt & Quantum Informat Vienna, A-1090 Vienna, Austria.;Vienna Ctr Quantum Sci & Technol, A-1090 Vienna, Austria.;HH Wills Phys Lab, Quantum Engn Technol Labs, Bristol BS8 1FD, Avon, England.;Univ Bristol, Dept Elect & Elect Engn, Bristol BS8 1UB, Avon, England. (creator_code:org_t)
2019-03-14
2019
Engelska.
Ingår i: Proceedings of the National Academy of Sciences of the United States of America. - : NATL ACAD SCIENCES. - 0027-8424 .- 1091-6490. ; 116:14, s. 6684-6688
Relaterad länk:
https://doi.org/10.1...
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https://www.pnas.org...
https://urn.kb.se/re...
https://doi.org/10.1...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • 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.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

quantum entanglement
quantum key distribution
quantum cryptography
polarization-entangled photons

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