Work

Quantum repeater node with free-space coupled trapped ions

Year: 2024

Type: article

Abstract: Quantum repeater cells are crucial for overcoming loss in long-distance quantum networks. Here, the authors present a trapped-ion implementation of a quantum repeater cell, using two ${}^{40}$Ca${}^{+}$ ions that act as quantum memories and are coupled to free-space photonic channels. With this setup they are able to demonstrate asynchronous generation of atom-photon and photon-photon entanglement.

Source: Physical Review A

DOI: 10.1103/physreva.110.032603

Authors: Max Bergerhoff, Omar Elshehy, Stephan Kucera, Matthias Kreis, Jürgen Eschner

Institution: Saarland University

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funder: Bundesministerium für Bildung und Forschung

Awards: Verbundprojekt: QR.X - Quantenrepeater.Link - QR.X -, Teilvorhaben: Komponenten für QR-Strecken zwischen hybriden Quantensystemen und Implementierung auf einer Faserteststrecke, Verbundprojekt: Q.Link.Extension - Q.Link.X -, Teilvorhaben: Schnittstellen zwischen materiellen und photonischen Quantenbits