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dc.contributor.authorLisenfeld, J
dc.contributor.authorGrabovskij, GJ
dc.contributor.authorMueller, C
dc.contributor.authorCole, JH
dc.contributor.authorWeiss, G
dc.contributor.authorUstinov, AV
dc.date.accessioned2020-12-17T03:51:41Z
dc.date.available2020-12-17T03:51:41Z
dc.date.issued2015-02-01
dc.identifierpii: ncomms7182
dc.identifier.citationLisenfeld, J., Grabovskij, G. J., Mueller, C., Cole, J. H., Weiss, G. & Ustinov, A. V. (2015). Observation of directly interacting coherent two-level systems in an amorphous material. NATURE COMMUNICATIONS, 6 (1), https://doi.org/10.1038/ncomms7182.
dc.identifier.issn2041-1723
dc.identifier.urihttp://hdl.handle.net/11343/255063
dc.description.abstractParasitic two-level tunnelling systems originating from structural material defects affect the functionality of various microfabricated devices by acting as a source of noise. In particular, superconducting quantum bits may be sensitive to even single defects when these reside in the tunnel barrier of the qubit's Josephson junctions, and this can be exploited to observe and manipulate the quantum states of individual tunnelling systems. Here, we detect and fully characterize a system of two strongly interacting defects using a novel technique for high-resolution spectroscopy. Mutual defect coupling has been conjectured to explain various anomalies of glasses, and was recently suggested as the origin of low-frequency noise in superconducting devices. Our study provides conclusive evidence of defect interactions with full access to the individual constituents, demonstrating the potential of superconducting qubits for studying material defects. All our observations are consistent with the assumption that defects are generated by atomic tunnelling.
dc.languageEnglish
dc.publisherNATURE PUBLISHING GROUP
dc.rights.urihttps://creativecommons.org/licenses/by/4.0
dc.titleObservation of directly interacting coherent two-level systems in an amorphous material
dc.typeJournal Article
dc.identifier.doi10.1038/ncomms7182
melbourne.affiliation.departmentSchool of Physics
melbourne.source.titleNature Communications
melbourne.source.volume6
melbourne.source.issue1
dc.rights.licenseCC BY
melbourne.elementsid1231530
melbourne.contributor.authorCole, Jared
dc.identifier.eissn2041-1723
melbourne.accessrightsOpen Access


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