Rare-earth ions in crystals for integrating quantum resources
Abstract: Quantum technology that surpasses any possible classical counterpart will likely require a scalable platform that enables the large scale integration of entangled qubits. Crystals containing rare-earth ions are one system that possesses many appealing attributes to facilitate such large scale quantum integration. These attributes include optically accessible spins with long coherence times (up to 6 hours  ), demonstrated performance as photonic quantum memories [2,3], and their potential for single-spin qubits  and on-chip photonic platforms .
In this seminar I will introduce the solid-state rare-earth ion system and highlight its appeal for creating a versatile platform for integrating quantum resources. I will then focus on some of the work being undertaken in the Faraon group to engineer the properties of rare-earth ions in crystals using nanophotonic resonators. These photonic crystal cavities provide significant miniaturization and enhancement of the rare-earth system, providing a route toward integrated on-chip quantum devices.
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