Radio frequency charge parity meter

M. D. Schroer, M. Jung, K. D. Petersson, J. R. Petta

Research output: Contribution to journalArticle

41 Scopus citations

Abstract

We demonstrate a total charge parity measurement by detecting the radio frequency signal that is reflected by a lumped-element resonator coupled to a single InAs nanowire double quantum dot. The high frequency response of the circuit is used to probe the effects of the Pauli exclusion principle at interdot charge transitions. Even parity charge transitions show a striking magnetic field dependence that is due to a singlet-triplet transition, while odd parity transitions are relatively insensitive to a magnetic field. The measured response agrees well with cavity input-output theory, allowing accurate measurements of the interdot tunnel coupling and the resonator-charge coupling rate g c/2π∼17MHz.

Original languageEnglish (US)
Article number166804
JournalPhysical review letters
Volume109
Issue number16
DOIs
StatePublished - Oct 17 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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