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JOURNALS // Uspekhi Fizicheskikh Nauk // Archive

UFN, 2021 Volume 191, Number 10, Pages 1077–1094 (Mi ufn6852)

This article is cited in 9 papers

REVIEWS OF TOPICAL PROBLEMS

Large quantum networks

D. D. Sukachev

University of Calgary

Abstract: 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.

PACS: 03.65.Ud, 03.67.-a, 42.50.Ex

Received: June 9, 2020
Revised: November 26, 2020
Accepted: November 26, 2020

DOI: 10.3367/UFNr.2020.11.038888


 English version:
Physics–Uspekhi, 2021, 64:10, 1021–1037

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© Steklov Math. Inst. of RAS, 2024