Gate voltage dependence of noise distribution in radio-frequency reflectometry in gallium arsenide quantum dots

Motoya Shinozaki, Yui Muto, Takahito Kitada, Takashi Nakajima, Matthieu R. Delbecq, Jun Yoneda, Kenta Takeda, Akito Noiri, Takumi Ito, Arne Ludwig, Andreas D. Wieck, Seigo Tarucha, Tomohiro Otsuka

Research output: Contribution to journalArticlepeer-review

Abstract

We investigate gate voltage dependence of electrical readout noise in high-speed rf reflectometry using gallium arsenide quantum dots. The fast Fourier transform spectrum from the real time measurement reflects build-in device noise and circuit noise including the resonator and the amplifier. We separate their noise spectral components by model analysis. Detail of gate voltage dependence of the flicker noise is investigated and compared to the charge sensor sensitivity. We point out that the dominant component of the readout noise changes by the measurement integration time.

Original languageEnglish
Article number035002
JournalApplied Physics Express
Volume14
Issue number3
DOIs
Publication statusPublished - 2021 Mar

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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