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

Volume

17

Issue

2

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

105

Lastpage

108

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/AlO_x/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;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2007.898247

Filename

4277738