Study of junction and bias parameters in readout of phase qubits

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dc.citation.epage68en_US
dc.citation.spage60en_US
dc.citation.volumeNumber475en_US
dc.contributor.authorZandi H.en_US
dc.contributor.authorSafaei, S.en_US
dc.contributor.authorKhorasani, S.en_US
dc.contributor.authorFardmanesh, M.en_US
dc.date.accessioned2016-02-08T09:47:03Z
dc.date.available2016-02-08T09:47:03Z
dc.date.issued2012en_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractThe exact numerical solution of the nonlinear Ginzburg-Landau equation for Josephson junctions is obtained, from which the precise nontrivial current density and effective potential of the Josephson junctions are found. Based on the resulting potential well, the tunneling probabilities of the associated bound states are computed which are in complete agreement with the reported experimental data. The effects of junction and bias parameters such as thickness of the insulating barrier, cross sectional area, bias current, and magnetic field are fully investigated using a successive perturbation approach. We define and compute figures of merit for achieving optimal operation of phase qubits and measurements of the corresponding states. Particularly, it is found that Josephson junctions with thicker barriers yield better performance in measurements of phase qubits. The variations of characteristic parameters such as life time of the states due to the above considered parameters are also studied and discussed to obtain the appropriate configuration setup.en_US
dc.identifier.doi10.1016/j.physc.2011.05.002en_US
dc.identifier.issn0921-4534
dc.identifier.urihttp://hdl.handle.net/11693/21485
dc.language.isoEnglishen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.physc.2011.05.002en_US
dc.source.titlePhysica C: Superconductivity and its Applicationsen_US
dc.subjectJosephson junctionen_US
dc.subjectPhase qubiten_US
dc.subjectQuantum informationen_US
dc.subjectTunnelingen_US
dc.subjectBias parametersen_US
dc.subjectBound stateen_US
dc.subjectCharacteristic parameteren_US
dc.subjectCorresponding stateen_US
dc.subjectCross sectional areaen_US
dc.subjectEffective potentialsen_US
dc.subjectExperimental dataen_US
dc.subjectFigures of meritsen_US
dc.subjectGinzburg-Landau equationsen_US
dc.subjectInsulating barriersen_US
dc.subjectJosephson junctionsen_US
dc.subjectLife-timesen_US
dc.subjectNumerical solutionen_US
dc.subjectOptimal operationen_US
dc.subjectPerturbation approachen_US
dc.subjectPhase qubiten_US
dc.subjectPotential wellsen_US
dc.subjectQuantum Informationen_US
dc.subjectTunneling probabilitiesen_US
dc.subjectElectron tunnelingen_US
dc.subjectJosephson junction devicesen_US
dc.subjectMagnetic fieldsen_US
dc.subjectQuantum computersen_US
dc.subjectQuantum opticsen_US
dc.titleStudy of junction and bias parameters in readout of phase qubitsen_US
dc.typeArticleen_US

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