Single-Shot Readout of Hole Spins in Ge

Vukušić, Lada and Kukučka, Josip and Watzinger, Hannes and Milem, Joshua Michael and Schäffler, Friedrich and Katsaros, Georgios (2018) Single-Shot Readout of Hole Spins in Ge. Nano Letters, 18 (11). pp. 7141-7145. ISSN 15306992

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The strong atomistic spin−orbit coupling of holes makes single-shot spin readout measurements difficult because it reduces the spin lifetimes. By integrating the charge sensor into a high bandwidth radio frequency reflectometry setup, we were able to demonstrate single-shot readout of a germanium quantum dot hole spin and measure the spin lifetime. Hole spin relaxation times of about 90 μs at 500 mT are reported, with a total readout visibility of about 70%. By analyzing separately the spin-to-charge conversion and charge readout fidelities, we have obtained insight into the processes limiting the visibilities of hole spins. The analyses suggest that high hole visibilities are feasible at realistic experimental conditions, underlying the potential of hole spins for the realization of viable qubit devices.

Item Type: Article
DOI: 10.1021/acs.nanolett.8b03217
Subjects: 500 Science > 530 Physics
Research Group: Katsaros Group
Depositing User: Lada Vukusic
Date Deposited: 16 Nov 2018 08:06
Last Modified: 16 Nov 2018 08:06

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