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arXiv · 2206.12646

High cooperativity coupling of rare earth spins with planar superconducting resonator

Sihao Wang·Likai Yang·Rufus L. Cone·Charles W. Thiel·Hong Tang
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Abstract

Interfacing superconducting microwave resonator with rare earth doped crystals presents a promising hybrid quantum system for applications including spin-assisted transducers and memories. The coupling strength between spins of rare earth ions and the microwave photons is characterized by the cooperativity. Here we report an ultra-high cooperativity $C \sim$ 650 between rare earth spins and a planar superconducting microwave resonator that features a highly uniform magnetic field for harnessing the strong anisotropic coupling strength of erbium doped yttrium orthosilicate. This cooperativity rivals that from a bulk dielectric resonator and paves a path for efficiently coupling of spins with microwave photons on an integrated platform.

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Sihao Wang, Likai Yang, Rufus L. Cone, Charles W. Thiel, Hong Tang. 2022-06-25. High cooperativity coupling of rare earth spins with planar superconducting resonator. https://arxiv.org/abs/2206.12646

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