Low-frequency Noise in Josephson Junctions for Superconducting Qubits

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dc.creatorEroms, J.
dc.creatorvan Schaarenburg, L. C.
dc.creatorDriessen, E. F. C.
dc.creatorPlantenberg, J. H.
dc.creatorHuizinga, K.
dc.creatorSchouten, R. N.
dc.creatorVerbruggen, A. H.
dc.creatorHarmans, C. J. P. M.
dc.creatorMooij, J. E.
dc.date2006-04-12
dc.date2006-10-03
dc.date.accessioned2026-07-07T07:05:27Z
dc.date.available2026-07-07T07:05:27Z
dc.descriptionWe have studied low-frequency resistance fluctuations in shadow-evaporated Al/AlOx/Al tunnel junctions. Between 300 K and 5 K the spectral density follows a 1/f-law. Below 5 K, individual defects distort the 1/f-shape of the spectrum. The spectral density decreases linearly with temperature between 150 K and 1 K and saturates below 0.8 K. At 4.2 K, the spectral density is about two orders of magnitude lower than expected from a recent survey [D. J. Van Harlingen et al., Phys. Rev. B 70, 064510 (2004)]. Due to the saturation below 0.8 K the estimated qubit dephasing times at 100 mK are only about two times longer than calculated by Van Harlingen et al.
dc.descriptionJournal ref added, minor changes to match published version
dc.identifierhttps://arxiv.org/abs/cond-mat/0604306
dc.identifierhttp://arxiv.org/abs/cond-mat/0604306
dc.identifierAppl. Phys. Lett. 89, 122516 (2006)
dc.identifierdoi:10.1063/1.2357010
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/109674
dc.subjectSuperconductivity
dc.titleLow-frequency Noise in Josephson Junctions for Superconducting Qubits
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