Journal
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
Volume 17, Issue 2, Pages 105-108Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TASC.2007.898247
Keywords
Josephson junction; multiphoton; qubit; Rabi oscillation
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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 de SQUID phase qubit with Nb/AIO(x)/Nb tunnel junctions. Good agreement is found between theory and experiment.
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