dc.contributor.author | Orlando, Terry Philip | |
dc.contributor.author | Yan, Fei | |
dc.contributor.author | Bylander, Jonas | |
dc.contributor.author | Gustavsson, Simon | |
dc.contributor.author | Yoshihara, Fumiki | |
dc.contributor.author | Harrabi, Khalil | |
dc.contributor.author | Cory, David G. | |
dc.contributor.author | Nakamura, Yasunobu | |
dc.contributor.author | Tsai, Jaw-Shen | |
dc.contributor.author | Oliver, William D. | |
dc.date.accessioned | 2012-07-24T17:30:46Z | |
dc.date.available | 2012-07-24T17:30:46Z | |
dc.date.issued | 2012-05 | |
dc.date.submitted | 2012-04 | |
dc.identifier.issn | 1098-0121 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/71784 | |
dc.description.abstract | We 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.sponsorship | National Science Foundation (U.S.) (PHY-1005373) | en_US |
dc.description.sponsorship | United States. Army Research Office (W911NF-12-1-0036) | en_US |
dc.description.sponsorship | Japan Society for the Promotion of Science (FIRST Program) | en_US |
dc.description.sponsorship | National Institute of Information and Communications Technology (Japan) | en_US |
dc.description.sponsorship | Japan. Minstry of Education, Culture, Sports, Science and Technology | en_US |
dc.language.iso | en_US | |
dc.publisher | American Physical Society | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1103/PhysRevB.85.174521 | en_US |
dc.rights | Article 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.source | APS | en_US |
dc.title | Spectroscopy of low-frequency noise and its temperature dependence in a superconducting qubit | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Bylander, 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 Society | en_US |
dc.contributor.department | Lincoln Laboratory | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Research Laboratory of Electronics | en_US |
dc.contributor.approver | Orlando, Terry Philip | |
dc.contributor.mitauthor | Orlando, Terry Philip | |
dc.contributor.mitauthor | Yan, Fei | |
dc.contributor.mitauthor | Bylander, Jonas | |
dc.contributor.mitauthor | Gustavsson, Simon | |
dc.contributor.mitauthor | Oliver, William D. | |
dc.relation.journal | Physical Review B | en_US |
dc.eprint.version | Final published version | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Yan, Fei; Bylander, Jonas; Gustavsson, Simon; Yoshihara, Fumiki; Harrabi, Khalil; Cory, David; Orlando, Terry; Nakamura, Yasunobu; Tsai, Jaw-Shen; Oliver, William | en |
dc.identifier.orcid | https://orcid.org/0000-0002-7069-1025 | |
dc.identifier.orcid | https://orcid.org/0000-0002-4674-2806 | |
dc.identifier.orcid | https://orcid.org/0000-0002-4436-6886 | |
mit.license | PUBLISHER_POLICY | en_US |
mit.metadata.status | Complete | |