Quantum networks using rare-earth ions
Wolfgang Tittel, Mikael Afzelius, Adam Kinos, Lars Rippe, Andreas Walther
TL;DR
This paper reviews the potential of rare-earth ion-doped crystals for quantum networks, focusing on their use in photon sources, quantum memories, and repeaters, and discusses recent advances and future directions.
Contribution
It provides a comprehensive overview of recent developments in rare-earth ion-based quantum network components and suggests future research pathways.
Findings
Rare-earth ions are suitable for quantum memories and photon sources.
Recent progress has been made in elementary quantum repeater links.
Future research directions are outlined for improving quantum network components.
Abstract
We review concepts and recent work related to creating light-matter interfaces for future quantum networks based on rare-earth ion-doped crystals. More precisely, we explore their unique suitability for creating photon sources, optical quantum memories for light, and qubits that allow quantum information processing. In addition, we review the state-of-the-art of elementary quantum repeater links, and provide suggestions for future research.
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