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Reviews of topical problems


Large quantum networks

 
University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada

Quantum networks that allow generating entangled states between distant qubits have enormous scientific and applied potential. They can be used for secure quantum cryptography and the teleportation of quantum states between cities and countries, in high-resolution astronomy, and in distributed quantum computing. The scattering of photons in an optical fiber and the difficulties in creating full-fledged quantum nodes impede the construction of large quantum networks. We review current approaches to the creation of such networks, with the emphasis on quantum repeaters intended for `compensating' losses in optical fibers. We also discuss methods for increasing the range of quantum cryptography systems without using quantum repeaters.

Fulltext pdf (1.2 MB)
Fulltext is also available at DOI: 10.3367/UFNe.2020.11.038888
Keywords: quantum network, quantum cryptography, quantum repeater
PACS: 03.65.Ud, 03.67.−a, 42.50.Ex (all)
DOI: 10.3367/UFNe.2020.11.038888
URL: https://ufn.ru/en/articles/2021/10/c/
000740826300003
2-s2.0-85123456910
Citation: Sukachev D D "Large quantum networks" Phys. Usp. 64 1021–1037 (2021)
BibTexBibNote ® (generic)BibNote ® (RIS)Medline RefWorks
RT Journal
T1 Large quantum networks
A1 Sukachev,D.D.
PB Physics-Uspekhi
PY 2021
FD 10 Oct, 2021
JF Physics-Uspekhi
JO Phys. Usp.
VO 64
IS 10
SP 1021-1037
DO 10.3367/UFNe.2020.11.038888
LK https://ufn.ru/en/articles/2021/10/c/

Received: 9th, June 2020, revised: 26th, November 2020, 26th, November 2020

Оригинал: Сукачёв Д Д «Протяжённые квантовые сети» УФН 191 1077–1094 (2021); DOI: 10.3367/UFNr.2020.11.038888

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