Journal article

Microwave quantum optics as a direct probe of the Overhauser field in a quantum dot circuit quantum electrodynamics device

Pei-Qing Jin, Jan Jeske, Andrew D Greentree, Jared H Cole

PHYSICAL REVIEW B | AMER PHYSICAL SOC | Published : 2021

Abstract

We show theoretically that a quantum dot circuit quantum electrodynamics device can be used as a probe of the Overhauser field in quantum dots. By coupling a transmission line to the interdot tunneling gate, an electromagnetically induced transparency scheme can be established, whose Fano-type interference leads to a sharp curvature in the reflection spectrum around resonance. This sharp feature persists even in the presence of the fluctuating spin bath, rendering a high-resolution method to extract the bath's statistical information. For strong nuclear spin fields, the reflection spectrum exhibits an Autler-Townes splitting, where the peak locations indicate the strengths of the Overhauser ..

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Grants

Awarded by National Natural Science Foundation of China


Awarded by German Federal Ministry for Research and Education (BMBF)


Awarded by Australian Research Council


Funding Acknowledgements

We thank X.-M. Lu and P. Kotetes for helpful discussions. P.-Q.J. acknowledges financial support from the National Natural Science Foundation of China (Grant No. 11304196), as well as the Science and Technology Program of Shanghai Maritime University. J.J. acknowledges funding from the German Federal Ministry for Research and Education (BMBF) under Grant No. 13XP5063. J.J., A.D.G., and J.H.C. acknowledge the support of the Australian Research Council (Grants No. DP130104381, No. FT160100357, No. DP140100375, No. CE170100026) and the National Computational Infrastructure (NCI), which is supported by the Australian government.