Title :
Strong-Field Effects in the Rabi Oscillations of the Superconducting Phase Qubit
Author :
Strauch, Frederick W. ; Dutta, S.K. ; Paik, Hanhee ; Palomaki, T.A. ; Mitra, K. ; Cooper, B.K. ; Lewis, R.M. ; Anderson, J.R. ; Dragt, A.J. ; Lobb, C.J. ; Wellstood, F.C.
Author_Institution :
Nat. Inst. of Stand. & Technol., Gaithersburg
fDate :
6/1/2007 12:00:00 AM
Abstract :
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.
Keywords :
Josephson effect; SQUIDs; oscillations; quantum computing; Josephson junction; Rabi Oscillations; SQUID phase qubit; ac Stark shift; microwave drive power; prototypical logic operations; quantum bits; quantum computer; single-photon Rabi frequency; strong-field effects; superconducting devices; superconducting phase qubit; three-level multiphoton analysis; two-photon Rabi frequency; Frequency measurement; Josephson junctions; Logic devices; Niobium; Phase measurement; Prototypes; Quantum computing; Superconducting devices; Superconducting logic circuits; Superconducting microwave devices; Josephson junction; Rabi oscillation; multiphoton; qubit;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.898247
