Phys. Rev. Lett. 89, 117901 (2002) [4 pages]Rabi Oscillations in a Large Josephson-Junction QubitReceived 16 March 2002; published 21 August 2002 We have designed and operated a circuit based on a large-area current-biased Josephson junction whose two lowest energy quantum levels are used to implement a solid-state qubit. The circuit allows measurement of the qubit states with a fidelity of 85% while providing sufficient decoupling from external sources of relaxation and decoherence to allow coherent manipulation of the qubit state, as demonstrated by the observation of Rabi oscillations. This qubit circuit is the basis of a scalable quantum computer. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.117901
DOI:
10.1103/PhysRevLett.89.117901
PACS:
03.67.Lx, 03.65.Yz, 74.50.+r, 85.25.Cp
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