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arXiv · 2407.08869

Ultra-dispersive resonator readout of a quantum-dot qubit using longitudinal coupling

Benjamin Harpt·J. Corrigan·Nathan Holman·Piotr Marciniec·D. Rosenberg·D. Yost·R. Das·Rusko Ruskov·Charles Tahan·William D. Oliver·R. McDermott·Mark Friesen·M. A. Eriksson
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Abstract

We perform readout of a quantum-dot hybrid qubit coupled to a superconducting resonator through a parametric, longitudinal interaction mechanism. Our experiments are performed with the qubit and resonator frequencies detuned by $\sim$10 GHz, demonstrating that longitudinal coupling can facilitate semiconductor qubit operation in the 'ultra-dispersive' regime of circuit quantum electrodynamics.

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Benjamin Harpt, J. Corrigan, Nathan Holman, Piotr Marciniec, D. Rosenberg, D. Yost, R. Das, Rusko Ruskov, Charles Tahan, William D. Oliver, R. McDermott, Mark Friesen, M. A. Eriksson. 2024-07-11. Ultra-dispersive resonator readout of a quantum-dot qubit using longitudinal coupling. https://doi.org/10.1038/s41534-025-00962-w

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