Year: 2022
Type: article
Abstract: Heralded entanglement between distant quantum memories is the key resource for quantum networks. Based on quantum repeater protocols, these networks will facilitate efficient large-scale quantum communication and distributed quantum computing. However, despite vast efforts, long-distance fibre based network links have not been realized yet. Here we present results demonstrating heralded entanglement between two independent, remote single-atom quantum memories generated over fibre links with a total length up to 33 km. To overcome the attenuation losses in the long optical fibres of photons initially emitted by the Rubidium quantum memories, we employ polarization-preserving quantum frequency conversion to the low loss telecom band. The presented work represents a milestone towards the realization of efficient quantum network links.
Source: Nature
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $11,390
Awards: G1768993395, Verbundprojekt: Quanten-Repeater-Plattform mit Methoden der Quantenoptik - Q.com-Quantenoptik -, Teilvorhaben: Elementare Quantenrepeaterverbindung über große Entfernungen, Verbundprojekt: Quanten-Repeater-Plattform mit Methoden der Quantenoptik - Q.com-Quantenoptik -, Teilvorhaben: Kontrollierte Emission, Konversion und Absorption einzelner Photonen als Baustein für Quantenschnittstellen, G7171623445, Verbundprojekt: Q.Link.Extension - Q.Link.X -, Teilvorhaben: Schnittstellen zwischen materiellen und photonischen Quantenbits, Verbundprojekt: Q.Link.Extension - Q.Link.X -, Teilvorhaben: QR-Segment über lange Faserstrecken, EXC 2111: Munich Center for Quantum Science and Technology (MCQST)
OpenAlex ID: W3215065993