This article is cited in 3 papers

INTERNATIONAL YEAR OF QUANTUM SCIENCE AND TECHNOLOGY. REVIEWS OF TOPICAL PROBLEMS

Quantum repeaters: current research trends and latest achievements

R. A. Akhmedzhanov^a, Yu. Yu. Balega^b, A. D. Deev^cd, A. A. Kalachev<sup>e

a</sup> Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod
^b Russian Academy of Sciences, China Branch of BRICS Institute of Future Networks, Shenzhen, China
^c Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Moscow Region
^d R&D Center JSC, Moscow
^e Federal Research Center Kazan Scientific Center, Russian Academy of Sciences

Abstract: We present a review of current theoretical and experimental studies focused on the development of a quantum repeater, a key device for extended quantum networks that allows entangled states to be distributed over long distances. We also consider the most promising approaches to designing basic devices for quantum repeaters, including quantum memory, sources of nonclassical states of light, and quantum frequency converters.

Keywords: quantum repeaters, optical quantum memory, single-photon sources, two-photon sources, entanglement, quantum frequency converters

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

Received: April 24, 2024
Revised: May 18, 2025
Accepted: May 19, 2025

DOI: 10.3367/UFNr.2025.05.039918

 English version: Physics–Uspekhi, 2025, 68:9, 857–882

Bibliographic databases:

• 
• 
•