Probing Temperature Dependent Noise in Flux Qubits via Macroscopic Resonant Tunneling

Probing Temperature Dependent Noise in Flux Qubits via Macroscopic Resonant Tunneling

Detalles Bibliográficos
Parent link:Bulletin of the American Physical Society.— , 2008
Vol. 53, № 2.— 2008.— Abstract: X10.00010
Outros autores: Berkley A. J., Harris R., Johnson M. W., Johansson J., Bunyk P., Govorkov S., Thom M. C., Uchaykin (Uchaikin) S. V. Sergey Victorovich, Truncik C. J. S., Amin M. H. S., Han S., Bumble B., Fung A., Kaul A., Kleinsasser A., Averin D. V.
Summary:Macroscopic resonant tunneling between the two lowest lying states of a bistable RF-SQUID is used to characterize flux noise in a potential qubit. Detailed measurements of incoherent decay rates as a function of flux bias revealed that the Gaussian shaped tunneling rate is not peaked at the resonance point, but is shifted to a flux bias at which the initial well is higher than the target well. This observation indicates that the dominant low frequency (1/f) flux noise in this device is quantum mechanical in nature. The r.m.s. amplitude of the noise, which is proportional to decoherence rate 1/T ∗ 2 , was observed to be weakly dependent on temperature below 70 mK.
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Idioma:inglés
Publicado: 2008
Subjects:
труды учёных ТПУ
Formato: Capítulo de libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=600819

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