期刊
SCIENCE BULLETIN
卷 64, 期 21, 页码 1577-1583出版社
ELSEVIER
DOI: 10.1016/j.scib.2019.09.006
关键词
Quantum repeater; Quantum memory; Heralded single photons; Orbital angular momentum; Telecommunication band
资金
- National Key R&D Program of China [2017YFA0304100]
- National Natural Science Foundation of China [61327901, 11774331, 11774335, 11504362, 11821404, 11654002]
- Anhui Initiative in Quantum Information Technologies [AHY020100]
- Key Research Program of Frontier Sciences, CAS [QYZDY-SSW-SLH003]
- Fundamental Research Funds for the Central Universities [WK2470000023, WK2470000026]
A memory-based quantum repeater architecture provides a solution to distribute quantum information to an arbitrary long distance. Practical quantum repeaters are likely to be built in optical-fiber networks which take advantage of the low-loss transmission between quantum memory nodes. Most quantum memory platforms have characteristic atomic transitions away from the telecommunication band. A nondegenerate photon pair source is therefore useful for connection of a quantum memory to optical fibers. Here, we report a high-brightness narrowband photon-pair source which is compatible with a rare-earth-ion-doped crystal Pr3+ :Y2SiO5. The photon-pair source is generated through a cavity-enhanced spontaneous parametric down-conversion process with the signal photon at 606 nm and the idler photon at 1540 nm. Moreover, using the telecom C-band idler photons for heralding, we demonstrate the reversible transfer of orbital-angular-momentum qubit between the signal photon and the quantum memory based on Pr-3(+):Y2SiO5. (C) 2019 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
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