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dc.contributor.authorOrlando, Terry Philip
dc.contributor.authorYan, Fei
dc.contributor.authorBylander, Jonas
dc.contributor.authorGustavsson, Simon
dc.contributor.authorYoshihara, Fumiki
dc.contributor.authorHarrabi, Khalil
dc.contributor.authorCory, David G.
dc.contributor.authorNakamura, Yasunobu
dc.contributor.authorTsai, Jaw-Shen
dc.contributor.authorOliver, William D.
dc.date.accessioned2012-07-24T17:30:46Z
dc.date.available2012-07-24T17:30:46Z
dc.date.issued2012-05
dc.date.submitted2012-04
dc.identifier.issn1098-0121
dc.identifier.urihttp://hdl.handle.net/1721.1/71784
dc.description.abstractWe report a direct measurement of the low-frequency noise spectrum in a superconducting flux qubit. Our method uses the noise sensitivity of a free-induction Ramsey interference experiment, comprising free evolution in the presence of noise for a fixed period of time followed by single-shot qubit-state measurement. Repeating this procedure enables Fourier-transform noise spectroscopy with access to frequencies up to the achievable repetition rate, a regime relevant to dephasing in ensemble-averaged time-domain measurements such as Ramsey interferometry. Rotating the qubit's quantization axis allows us to measure two types of noise: effective flux noise and effective critical-current or charge noise. For both noise sources, we observe that the very same 1/f-type power laws measured at considerably higher frequencies (0.2−20 MHz) are consistent with the noise in the 0.01−100-Hz range measured here. We find no evidence of temperature dependence of the noises over 65−200 mK, and also no evidence of time-domain correlations between the two noises. These methods and results are pertinent to the dephasing of all superconducting qubits.en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (PHY-1005373)en_US
dc.description.sponsorshipUnited States. Army Research Office (W911NF-12-1-0036)en_US
dc.description.sponsorshipJapan Society for the Promotion of Science (FIRST Program)en_US
dc.description.sponsorshipNational Institute of Information and Communications Technology (Japan)en_US
dc.description.sponsorshipJapan. Minstry of Education, Culture, Sports, Science and Technologyen_US
dc.language.isoen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevB.85.174521en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAPSen_US
dc.titleSpectroscopy of low-frequency noise and its temperature dependence in a superconducting qubiten_US
dc.typeArticleen_US
dc.identifier.citationBylander, Jonas, David G. Cory, Simon Gustavsson, Khalil Harrabi, Yasunobu Nakamura, Terry P. Orlando, William D. Oliver, Jaw-Shen Tsai, Fei Yan, and Fumiki Yoshihara. "Spectroscopy of low-frequency noise and its temperature dependence in a superconducting qubit." Physical Review B 85 (2012): 174521-1 - 174521-10. URL: http://link.aps.org/doi/10.1103/PhysRevB.85.174521 Copyright 2012 American Physical Societyen_US
dc.contributor.departmentLincoln Laboratoryen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Scienceen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Nuclear Science and Engineeringen_US
dc.contributor.departmentMassachusetts Institute of Technology. Research Laboratory of Electronicsen_US
dc.contributor.approverOrlando, Terry Philip
dc.contributor.mitauthorOrlando, Terry Philip
dc.contributor.mitauthorYan, Fei
dc.contributor.mitauthorBylander, Jonas
dc.contributor.mitauthorGustavsson, Simon
dc.contributor.mitauthorOliver, William D.
dc.relation.journalPhysical Review Ben_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsYan, Fei; Bylander, Jonas; Gustavsson, Simon; Yoshihara, Fumiki; Harrabi, Khalil; Cory, David; Orlando, Terry; Nakamura, Yasunobu; Tsai, Jaw-Shen; Oliver, Williamen
dc.identifier.orcidhttps://orcid.org/0000-0002-7069-1025
dc.identifier.orcidhttps://orcid.org/0000-0002-4674-2806
dc.identifier.orcidhttps://orcid.org/0000-0002-4436-6886
mit.licensePUBLISHER_POLICYen_US


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