Physics – Condensed Matter – Superconductivity
Scientific paper
2007-03-23
Phys. Rev. Lett. 99, 050501 (2007)
Physics
Condensed Matter
Superconductivity
4 pages, 5 figures, version with high resolution figures available at http://qudev.ethz.ch/content/science/PubsPapers.html
Scientific paper
10.1103/PhysRevLett.99.050501
Sideband transitions are spectroscopically probed in a system consisting of a Cooper pair box strongly but non-resonantly coupled to a superconducting transmission line resonator. When the Cooper pair box is operated at the optimal charge bias point the symmetry of the hamiltonian requires a two photon process to access sidebands. The observed large dispersive ac-Stark shifts in the sideband transitions induced by the strong non-resonant drives agree well with our theoretical predictions. Sideband transitions are important in realizing qubit-photon and qubit-qubit entanglement in the circuit quantum electrodynamics architecture for quantum information processing.
Blais Alexandre
Devoret Michel H.
Frunzio Luigi
Gambetta Jay M.
Girvin Steven M.
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