Heralded Distribution of Single-Photon Path Entanglement.
- Caspar P Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland.
- Verbanis E Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland.
- Oudot E Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland.
- Maring N Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland.
- Samara F Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland.
- Caloz M Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland.
- Perrenoud M Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland.
- Sekatski P Quantum Optics Theory Group, University of Basel, CH-4056 Basel, Switzerland.
- Martin A Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland.
- Sangouard N Quantum Optics Theory Group, University of Basel, CH-4056 Basel, Switzerland.
- Zbinden H Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland.
- Thew RT Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland.
- 2020-09-25
Published in:
- Physical review letters. - 2020
English
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.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1103/PhysRevLett.125.110506
- PMID 32975988
- Persistent URL
- https://sonar.ch/global/documents/232844
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