Low-bandwidth control scheme for an oscillator stabilized Josephson qubit

Details Low-bandwidth control scheme for an oscillator stabilized Josephson qubit Low-bandwidth control scheme for an oscillator stabilized Josephson qubit

2004-11-15

arxiv.org/abs/cond-mat/0411380v1

Physics

Condensed Matter

Superconductivity

5 pages, pdflatex

Scientific paper

10.1103/PhysRevB.72.092512

We introduce a new Josephson junction circuit for which quantum operations are realized by low-bandwidth, nearly adiabatic magnetic-flux pulses. Coupling to the fundamental mode of a superconducting transmission line permits a stabilization of the rotation angle of the quantum operation against flux noise. A complete scheme for one-qubit rotations, and high-visibility Ramsey-fringe oscillations, is given. We show that high visibility depends on passing through a portal in the space of applied fluxes, where the width of the portal is proportional to the ramp-up rate of the flux pulse.

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