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Radio Frequency Charge Parity Meter

Author(s): Schroer, MD; Jung, M; Petersson, KD; Petta, Jason R

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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)/2 pi similar to 17 MHz.
Publication Date: 19-Oct-2012
Electronic Publication Date: 17-Oct-2012
Citation: Schroer, MD, Jung, M, Petersson, KD, Petta, JR. (2012). Radio Frequency Charge Parity Meter. PHYSICAL REVIEW LETTERS, 109 (10.1103/PhysRevLett.109.166804
DOI: doi:10.1103/PhysRevLett.109.166804
ISSN: 0031-9007
Type of Material: Journal Article
Journal/Proceeding Title: PHYSICAL REVIEW LETTERS
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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