Quantum repeaters -- important components of a scalable quantum internet --
enable the entanglement to be distributed over long distances. The standard
paradigm for a quantum repeater relies on a necessary demanding requirement of
quantum memory. Despite significant progress, the limited performance of
quantum memory makes practical quantum repeaters still a great challenge.
Remarkably, a proposed all-photonic quantum repeater avoids the need for
quantum memory by harnessing the graph states in the repeater nodes. Here we
perform an experimental demonstration of an all-photonic quantum repeater using
linear optics. By manipulating a 12-photon interferometer, we implement a
2-by-2 parallel all-photonic quantum repeater, and observe an 89% enhancement
of entanglement-generation rate over the standard parallel entanglement
swapping. These results open a new way towards designing repeaters with
efficient single-photon sources and photonic graph states, and suggest that the
all-photonic scheme represents an alternative path -- parallel to that of
matter-memory-based schemes -- towards realizing practical quantum repeaters.
Beschreibung
Experimental quantum repeater without quantum memory
%0 Generic
%1 li2019experimental
%A Li, Zheng-Da
%A Zhang, Rui
%A Yin, Xu-Fei
%A Liu, Li-Zheng
%A Hu, Yi
%A Fang, Yu-Qiang
%A Fei, Yue-Yang
%A Jiang, Xiao
%A Zhang, Jun
%A Li, Li
%A Liu, Nai-Le
%A Xu, Feihu
%A Chen, Yu-Ao
%A Pan, Jian-Wei
%D 2019
%K Experimental
%R 10.1038/s41566-019-0468-5
%T Experimental quantum repeater without quantum memory
%U http://arxiv.org/abs/1908.05351
%X Quantum repeaters -- important components of a scalable quantum internet --
enable the entanglement to be distributed over long distances. The standard
paradigm for a quantum repeater relies on a necessary demanding requirement of
quantum memory. Despite significant progress, the limited performance of
quantum memory makes practical quantum repeaters still a great challenge.
Remarkably, a proposed all-photonic quantum repeater avoids the need for
quantum memory by harnessing the graph states in the repeater nodes. Here we
perform an experimental demonstration of an all-photonic quantum repeater using
linear optics. By manipulating a 12-photon interferometer, we implement a
2-by-2 parallel all-photonic quantum repeater, and observe an 89% enhancement
of entanglement-generation rate over the standard parallel entanglement
swapping. These results open a new way towards designing repeaters with
efficient single-photon sources and photonic graph states, and suggest that the
all-photonic scheme represents an alternative path -- parallel to that of
matter-memory-based schemes -- towards realizing practical quantum repeaters.
@misc{li2019experimental,
abstract = {Quantum repeaters -- important components of a scalable quantum internet --
enable the entanglement to be distributed over long distances. The standard
paradigm for a quantum repeater relies on a necessary demanding requirement of
quantum memory. Despite significant progress, the limited performance of
quantum memory makes practical quantum repeaters still a great challenge.
Remarkably, a proposed all-photonic quantum repeater avoids the need for
quantum memory by harnessing the graph states in the repeater nodes. Here we
perform an experimental demonstration of an all-photonic quantum repeater using
linear optics. By manipulating a 12-photon interferometer, we implement a
2-by-2 parallel all-photonic quantum repeater, and observe an 89% enhancement
of entanglement-generation rate over the standard parallel entanglement
swapping. These results open a new way towards designing repeaters with
efficient single-photon sources and photonic graph states, and suggest that the
all-photonic scheme represents an alternative path -- parallel to that of
matter-memory-based schemes -- towards realizing practical quantum repeaters.},
added-at = {2019-09-11T17:22:26.000+0200},
author = {Li, Zheng-Da and Zhang, Rui and Yin, Xu-Fei and Liu, Li-Zheng and Hu, Yi and Fang, Yu-Qiang and Fei, Yue-Yang and Jiang, Xiao and Zhang, Jun and Li, Li and Liu, Nai-Le and Xu, Feihu and Chen, Yu-Ao and Pan, Jian-Wei},
biburl = {https://www.bibsonomy.org/bibtex/2dab6beef405c30e52362a1e0f05c4f2f/annapappa},
description = {Experimental quantum repeater without quantum memory},
doi = {10.1038/s41566-019-0468-5},
interhash = {ed638ef4057af0d7981992b16b267ad3},
intrahash = {dab6beef405c30e52362a1e0f05c4f2f},
keywords = {Experimental},
note = {cite arxiv:1908.05351Comment: Published online in Nature Photonics},
timestamp = {2019-09-11T17:22:26.000+0200},
title = {Experimental quantum repeater without quantum memory},
url = {http://arxiv.org/abs/1908.05351},
year = 2019
}