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- W4308165676 abstract "Spin qubits in germanium are a promising contender for scalable quantum computers. Reading out of the spin and charge configuration of quantum dots formed in Ge/Si core/shell nanowires is typically performed by measuring the current through the nanowire. Here, we demonstrate a more versatile approach on investigating the charge configuration of these quantum dots. We employ a high-impedance, magnetic-field resilient superconducting resonator based on NbTiN and couple it to a double quantum dot in a Ge/Si nanowire. This allows us to dispersively detect charging effects, even in the regime where the nanowire is fully pinched off and no direct current is present. Furthermore, by increasing the electro-chemical potential far beyond the nanowire pinch-off, we observe indications for depleting the last hole in the quantum dot by using the second quantum dot as a charge sensor. This work opens the door for dispersive readout and future spin-photon coupling in this system." @default.
- W4308165676 created "2022-11-08" @default.
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- W4308165676 date "2022-11-01" @default.
- W4308165676 modified "2023-10-14" @default.
- W4308165676 title "Charge-sensing of a Ge/Si core/shell nanowire double quantum dot using a high-impedance superconducting resonator" @default.
- W4308165676 doi "https://doi.org/10.48550/arxiv.2211.00763" @default.
- W4308165676 hasPublicationYear "2022" @default.
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