Heralded Distribution of Single-Photon Path Entanglement

Caspar, Patrik; Verbanis, Ephanielle; Oudot, Enky; Maring, Nicolas; Samara, Farid; Caloz, Misael; Perrenoud, Matthieu; Sekatski, Pavel; Martin, Anthony Christophe; Sangouard, Nicolas; Zbinden, Hugo; Thew, Rob

doi:10.1103/PhysRevLett.125.110506

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Title		Heralded Distribution of Single-Photon Path Entanglement
Authors		Caspar, Patrik Verbanis, Ephanielle Oudot, Enky Maring, Nicolas Samara, Farid Caloz, Misael Perrenoud, Matthieu Sekatski, Pavel Martin, Anthony Christophe Sangouard, Nicolas Zbinden, Hugo Thew, Rob show all authors [1 - 12]
Published in		Physical Review Letters. 2020, vol. 125, no. 11, 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.
Identifiers		DOI: 10.1103/PhysRevLett.125.110506
Full text		Article (Published version) (804 Kb) - Limited access to UNIGE Other version: https://link.aps.org/doi/10.1103/PhysRevLett.125.110506
Structures		Faculté des sciences / Section de physique / Groupe de physique appliquée
Research group		Groupe Zbinden
Citation (ISO format)		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