Low-temperature decoherence of qubit coupled to background charges

Grishin, Alex, Yurkevich, Igor V. and Lerner, Igor V. (2005). Low-temperature decoherence of qubit coupled to background charges. Physical Review B, 72 (6),

Abstract

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
Divisions: Engineering & Applied Sciences > Mathematics
Uncontrolled Keywords: Josephson charge
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://journals ... sRevB.72.060509 (Publisher URL)
Published Date: 2005-08-25
Authors: Grishin, Alex
Yurkevich, Igor V. ( 0000-0003-1447-8913)
Lerner, Igor V.

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