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Heralded Distribution of Single-Photon Path Entanglement

Sekatski, Pavel
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Published in Physical Review Letters. 2020, vol. 125, no. 11, p. 110506
Abstract 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 postselection. 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.
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Research group Groupe Zbinden
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CASPAR, Patrik et al. Heralded Distribution of Single-Photon Path Entanglement. In: Physical Review Letters, 2020, vol. 125, n° 11, p. 110506. doi: 10.1103/PhysRevLett.125.110506 https://archive-ouverte.unige.ch/unige:141189

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Deposited on : 2020-09-14

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