Remote entanglement distribution in a quantum network via multinode indistinguishability of photons
Year: 2022
Type: article
Abstract: Quantum networking relies on entanglement distribution between distant nodes, typically realized by swapping procedures. However, entanglement swapping is a demanding task in practice, mainly because of limited effectiveness of entangled photon sources and Bell-state measurements necessary to realize the process. Here we experimentally activate a remote distribution of two-photon polarization entanglement superseding the need for initial entangled pairs and traditional Bell-state measurements. This alternative procedure is accomplished thanks to the controlled spatial indistinguishability of four independent photons in three separated nodes of the network, which enables us to perform localized product-state measurements in the central node acting as a trigger. This experiment proves that the inherent indistinguishability of identical particles supply promising standards for feasible quantum communication in multinode photonic quantum networks.
Source: Physical Review A
Institutions: University of Science and Technology of China, CAS Key Laboratory of Quantum Information, USTC, University of Palermo, Centre National de la Recherche Scientifique, Université Bourgogne Franche-Comté, Institut UTINAM, Observatoire des Sciences de l’Univers Terre Homme Environnement Temps Astronomie
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4295694168