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Telecom-heralded entanglement between multimode solid-state quantum memories
Nature (London), 2021-06, Vol.594 (7861), p.37-40
[Peer Reviewed Journal]
Copyright Nature Publishing Group Jun 3, 2021 ;ISSN: 0028-0836 ;EISSN: 1476-4687 ;DOI: 10.1038/s41586-021-03481-8
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Title:
Telecom-heralded entanglement between multimode solid-state quantum memories
Author:
Lago-Rivera, Dario
;
Grandi, Samuele
;
Rakonjac, Jelena V.
;
Seri, Alessandro
;
de Riedmatten, Hugues
Subjects:
Crystals
;
Entanglement
;
Laboratories
;
Microprocessors
;
Multiplexing
;
Photons
;
Praseodymium
;
Repeaters
;
Solid state
;
Telecommunications
;
Wavelengths
Is Part Of:
Nature (London), 2021-06, Vol.594 (7861), p.37-40
Description:
Future quantum networks will enable the distribution of entanglement between distant locations and allow applications in quantum communication, quantum sensing and distributed quantum computation1. At the core of this network lies the ability to generate and store entanglement at remote, interconnected quantum nodes2. Although various remote physical systems have been successfully entangled3-12, none of these realizations encompassed all of the requirements for network operation, such as compatibility with telecommunication (telecom) wavelengths and multimode operation. Here we report the demonstration of heralded entanglement between two spatially separated quantum nodes, where the entanglement is stored in multimode solid-state quantum memories. At each node a praseodymium-doped crystal13,14 stores a photon of a correlated pair15, with the second photon at telecom wavelengths. Entanglement between quantum memories placed in different laboratories is heralded by the detection of a telecom photon at a rate up to 1.4 kilohertz, and the entanglement is stored in the crystals for a pre-determined storage time up to 25 microseconds. We also show that the generated entanglement is robust against loss in the heralding path, and demonstrate temporally multiplexed operation, with 62 temporal modes. Our realization is extendable to entanglement over longer distances and provides a viable route towards field-deployed, multiplexed quantum repeaters based on solid-state resources.
Publisher:
London: Nature Publishing Group
Language:
English
Identifier:
ISSN: 0028-0836
EISSN: 1476-4687
DOI: 10.1038/s41586-021-03481-8
Source:
ProQuest One Psychology
ProQuest Central
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