Low-Temperature Decoherence of Qubit Coupled to Background Charges

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dc.creatorGrishin, Alex
dc.creatorYurkevich, Igor V.
dc.creatorLerner, Igor V.
dc.date2004-12-14
dc.date2005-08-02
dc.date.accessioned2026-07-07T13:10:01Z
dc.date.available2026-07-07T13:10:01Z
dc.descriptionWe 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 ($\gg T$) may essentially contribute to $Γ$.
dc.descriptionBoth figures are changed to illustrate a more generic case of impurity states spread in wide interval of energies. Some changes have been made to the abstract and the introduction
dc.identifierhttps://arxiv.org/abs/cond-mat/0412377
dc.identifierhttp://arxiv.org/abs/cond-mat/0412377
dc.identifierPhys. Rev. B 72, 060509(R) (2005)
dc.identifierdoi:10.1103/PhysRevB.72.060509
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/228929
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.titleLow-Temperature Decoherence of Qubit Coupled to Background Charges
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