Sung Ho Kim, Oun-Ho Park, et al.
Small
We introduce a 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. © 2005 The American Physical Society.
Sung Ho Kim, Oun-Ho Park, et al.
Small
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Advanced Materials
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Physical Review B
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Inorganic Chemistry