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Title

Time-resolved qubit readout via nonlinear Josephson inductance

AuthorsReuther, Georg M.; Zueco, David; Hänggi, Peter; Kohler, Sigmund
Issue DateSep-2011
PublisherInstitute of Physics Publishing
CitationNew Journal of Physics 13: 093022 (2011)
AbstractWe propose a generalization of dispersive qubit readout that provides the time evolution of a flux qubit observable. Our proposal relies on the nonlinear coupling of the qubit to a harmonic oscillator with high frequency, representing a dc superconducting quantum interference device. Information about the qubit dynamics is obtained by recording the oscillator response to resonant driving and subsequent lock-in detection. The measurement process is simulated for the example of coherent qubit oscillations. This corroborates the underlying measurement relation and also reveals that the measurement scheme possesses low backaction and high fidelity.
Description19 páginas, 3 figuras.
Publisher version (URL)http://dx.doi.org/10.1088/1367-2630/13/9/093022
URIhttp://hdl.handle.net/10261/47396
DOI10.1088/1367-2630/13/9/093022
ISSN1367-2630
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