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Paper detail

Heralded distribution of single-photon path entanglement

We report the experimental realization of heralded distribution of single-photon path entanglement at telecommunication wavelengths in a repeater-like architecture. The entanglement is established upon detection of a single photon, originating from one of two spontaneous parametric down conversion photon pair sources, after erasing the photon's which-path information. In order to certify the entanglement, we use an entanglement witness which does not rely on post-selection. We herald entanglement between two locations, separated by a total distance of 2 km of optical fiber, at a rate of 1.6 kHz. This work paves the way towards high-rate and practical quantum repeater architectures.

preprint2020arXivOpen access
Patrik CasparEphanielle VerbanisEnky OudotNicolas MaringFarid SamaraMisael CalozMatthieu PerrenoudPavel SekatskiAnthony MartinNicolas SangouardHugo ZbindenRob Thew
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Patrik CasparEphanielle VerbanisEnky OudotNicolas MaringFarid SamaraMisael CalozMatthieu PerrenoudPavel SekatskiAnthony MartinNicolas SangouardHugo ZbindenRob Thew

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