Towards high-rate entanglement distribution between quantum memories using frequency-multiplexed two-photon sources

Quantum internet is gaining attention as a next-generation infrastructure capable of supporting a wide range of quantum applications. The implementation of quantum internet requires development of quantum repeaters, which are essential for long-distance and networked quantum communication. Our goal is to achieve high-rate entanglement distribution using rare-earth-doped quantum memories, which are expected to enable multiplexing in multiple degrees of freedom, such as frequency multiplexing and time-division multiplexing.

In this presentation, we report on the progress of our experiments aimed at sharing entanglement between quantum memories. Specifically, we present the implementation of an integrated system that connects two frequency-multiplexed quantum memories based on Pr:YSO and two cavity-enhanced two-photon sources, all linked together via optical frequency comb control. The integration of these core technologies forms the foundation for long-distance, high-rate quantum communication based on multiplexed quantum repeaters.