Quasiparticle Poisoning and Quantum Coherence in a Differential Charge Qubit

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dc.creatorSchneiderman, J. F.
dc.creatorShaw, M. D.
dc.creatorPalmer, B.
dc.creatorDelsing, P.
dc.creatorEchternach, P. M.
dc.date2007-05-04
dc.date.accessioned2026-07-07T07:59:40Z
dc.date.available2026-07-07T07:59:40Z
dc.descriptionWe demonstrate the operation of a differential single Cooper-pair box, a charge qubit consisting of two aluminum islands, isolated from ground, coupled by a pair of small-area Josephson junctions, and read out with a superconducting differential radio-frequency single electron transistor. We have tested four devices, all of which show evidence of quasiparticle poisoning. The devices are characterized with microwave spectroscopy and temperature dependence studies, and Coulomb staircases are shown to be e-periodic in all samples. However, coherent control is still possible with non-adiabatic voltage pulses. Coherent oscillation experiments and a relaxation time measurement were performed using a charge derivative readout technique.
dc.description9 pages, 5 figures, two column format
dc.identifierhttps://arxiv.org/abs/0705.0695
dc.identifierhttp://arxiv.org/abs/0705.0695
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/128453
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.titleQuasiparticle Poisoning and Quantum Coherence in a Differential Charge Qubit
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