Energy relaxation of superconducting charge qubit via Andreev processes

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dc.creatorLutchyn, R. M.
dc.creatorGlazman, L. I.
dc.date2007-06-04
dc.date2007-08-21
dc.date.accessioned2026-07-07T08:28:38Z
dc.date.available2026-07-07T08:28:38Z
dc.descriptionWe study fundamental limitations on the energy relaxation rate of a superconducting charge qubit with a large-gap Cooper-pair box, $Δ_b > Δ_r$. At a sufficiently large mismatch between the gap energies in the box $Δ_b$ and in the reservoir $Δ_r$,"quasiparticle poisoning" becomes ineffective even in the presence of nonequilibrium quasiparticles in the reservoir. The qubit relaxation still may occur due to higher-order (Andreev) processes. In this paper we evaluate the qubit energy relaxation rate due to Andreev processes.
dc.description6 pages, 4 figures (accepted to Phys. Rev. B)
dc.identifierhttps://arxiv.org/abs/0706.0522
dc.identifierhttp://arxiv.org/abs/0706.0522
dc.identifierPhys. Rev. B 76, 104507 (2007)
dc.identifierdoi:10.1103/PhysRevB.76.104507
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/137690
dc.subjectSuperconductivity
dc.subjectMesoscale and Nanoscale Physics
dc.titleEnergy relaxation of superconducting charge qubit via Andreev processes
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