Coherent control of a flux qubit by phase-shifted resonant microwave pulses

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dc.creatorKutsuzawa, Tatsuya
dc.creatorSaito, Shiro
dc.creatorTanaka, Hirotaka
dc.creatorNakano, Hayato
dc.creatorSemba, Kouichi
dc.creatorTakayanagi, Hideaki
dc.date2005-01-25
dc.date.accessioned2026-07-07T03:03:25Z
dc.date.available2026-07-07T03:03:25Z
dc.descriptionThe quantum state of a flux qubit was successfully pulse-controlled by using a resonant microwave. We observed Ramsey fringes by applying a pair of phase-shifted pi/2 microwave pulses without introducing detuning. With this method, the qubit state can be rotated on an arbitrary axis in the x-y plane of the Bloch sphere in a rotating frame. We obtained a qubit signal from a coherent oscillation with an angular velocity of up to 2pi*11.4 Grad/s. In combination with Rabi pulses, this method enables us to achieve full control of single qubit operation. It also offers the possibility of orders of magnitude increases in the speed of the arbitrary unitary gate operation.
dc.description3 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0501592
dc.identifierhttp://arxiv.org/abs/cond-mat/0501592
dc.identifierAppl. Phys. Lett. 87, 073501 (2005) (3 pages)
dc.identifierdoi:10.1063/1.2010610
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25742
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.titleCoherent control of a flux qubit by phase-shifted resonant microwave pulses
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