Decoherence due to nodal quasiparticles in d-wave qubits

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dc.creatorFominov, Ya. V.
dc.creatorGolubov, A. A.
dc.creatorKupriyanov, M. Yu.
dc.date2003-04-16
dc.date2003-05-18
dc.date.accessioned2026-07-07T06:27:16Z
dc.date.available2026-07-07T06:27:16Z
dc.descriptionWe study the Josephson junction between two d-wave superconductors, which is discussed as an implementation of a qubit. We propose an approach that allows to calculate the decoherence time due to an intrinsic dissipative process: quantum tunneling between the two minima of the double-well potential excites nodal quasiparticles which lead to incoherent damping of quantum oscillations. The decoherence is weakest in the mirror junction, where the contribution of nodal quasiparticles corresponds to the superohmic dissipation and becomes small at small tunnel splitting of the energy level in the double-well potential. For available experimental data, we estimate the quality factor.
dc.description5 pages, 3 EPS figures; the style file jetpl.cls is included. Version 2: minor corrections
dc.identifierhttps://arxiv.org/abs/cond-mat/0304383
dc.identifierhttp://arxiv.org/abs/cond-mat/0304383
dc.identifierJETP Letters 77, 587 (2003) [Pis'ma v ZhETF 77, 691 (2003)]
dc.identifierdoi:10.1134/1.1595702
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/97369
dc.subjectSuperconductivity
dc.subjectMesoscale and Nanoscale Physics
dc.titleDecoherence due to nodal quasiparticles in d-wave qubits
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