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Title

Quantum phase tomography of a strongly driven qubit

AuthorsRudner, Mark S.; Shytov, A. V.; Levitov, Leonid S.; Berns, David M.; Oliver, William D.; Valenzuela, Sergio O. ; Orlando, Terry P.
Issue Date2008
PublisherAmerican Physical Society
CitationPhysical Review Letters 101(19): 190502 (2008)
AbstractThe interference between repeated Landau-Zener transitions in a qubit swept through an avoided level crossing results in Stückelberg oscillations in qubit magnetization, a hallmark of the coherent strongly driven regime in two-level systems. The two-dimensional Fourier transforms of the resulting oscillatory patterns are found to exhibit a family of one-dimensional curves in Fourier space, in agreement with recent observations in a superconducting qubit. We interpret these images in terms of time evolution of the quantum phase of the qubit state and show that they can be used to probe dephasing mechanisms.
DescriptionUnder the terms of the Creative Commons Attribution License 3.0 (CC-BY).
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.101.190502
URIhttp://hdl.handle.net/10261/122525
DOI10.1103/PhysRevLett.101.190502
Identifiersdoi: 10.1103/PhysRevLett.101.190502
issn: 0031-9007
e-issn: 1079-7114
Appears in Collections:(CIN2) Artículos
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