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Strong-Field Effects in the Rabi Oscillations of the Superconducting Phase Qubit

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11 Author(s)
Strauch, F.W. ; Nat. Inst. of Stand. & Technol., Gaithersburg ; Dutta, S.K. ; Paik Hanhee ; Palomaki, T.A.
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Rabi oscillations have been observed in many superconducting devices, and represent prototypical logic operations for quantum bits (qubits) in a quantum computer. We use a three-level multiphoton analysis to understand the behavior of the superconducting phase qubit (current-biased Josephson junction) at high microwave drive power. Analytical and numerical results for the ac Stark shift, single-photon Rabi frequency, and two-photon Rabi frequency are compared to measurements made on a dc SQUID phase qubit with Nb/AlOx/Nb tunnel junctions. Good agreement is found between theory and experiment.

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:17 ,  Issue: 2 )