Low-temperature decoherence of qubit coupled to background charges


We have found an exact expression for the decoherence rate of a Josephson charge qubit coupled to fluctuating background charges. At low temperatures T the decoherence rate Γ is linear in T while at high temperatures it saturates in agreement with a known classical solution which, however, reached at surprisingly high T. In contrast to the classical picture, impurity states spread in a wide interval of energies (> T) may essentially contribute to Γ.

Publication DOI: https://doi.org/10.1103/PhysRevB.72.060509
Uncontrolled Keywords: Josephson charge
Publication ISSN: 1550-235X
Last Modified: 17 Jul 2024 07:03
Date Deposited: 15 Jul 2014 10:24
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://journals ... sRevB.72.060509 (Publisher URL)
PURE Output Type: Article
Published Date: 2005-08-25
Authors: Grishin, Alex
Yurkevich, Igor V. (ORCID Profile 0000-0003-1447-8913)
Lerner, Igor V.



Version: Accepted Version

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