High cooperativity coupling between a phosphorus donor spin ensemble and a superconducting microwave resonator

@article{Zollitsch2015HighCC,
  title={High cooperativity coupling between a phosphorus donor spin ensemble and a superconducting microwave resonator},
  author={C. W. Zollitsch and Kai Mueller and David P Franke and Sebastian T. B. Goennenwein and Martin S. Brandt and Rudolf Gross and Hans Huebl},
  journal={arXiv: Quantum Physics},
  year={2015}
}
We investigate the coupling of an ensemble of phosphorus donors in an isotopically purified $^{28}$Si host lattice interacting with a superconducting coplanar waveguide resonator. The microwave transmission spectrum of the resonator shows a normal mode splitting characteristic for high cooperativity. The evaluated collective coupling strength $g_{\mathrm{eff}}$ is of the same order as the loss rate of the spin system $\gamma$, indicating the onset of strong coupling. We develop a statistical… Expand

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