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Multiphoton spectroscopy of a hybrid quantum system

By P. Bushev, C. Mueller, J. Lisenfeld, J. H. Cole, A. Lukashenko, A. Shnirman and A. V. Ustinov


We report on experimental multiphoton spectroscopy of a hybrid quantum system consisting of a superconducting phase qubit coherently coupled to an intrinsic two-level system (TLS). We directly probe hybridized states of the combined qubit-TLS system in the strongly interacting regime, where both the qubit-TLS coupling and the driving cannot be considered as weak perturbations. This regime is described by a theoretical model which incorporates anharmonic corrections, multiphoton processes and decoherence. We present a detailed comparison between experiment and theory and find excellent agreement over a wide range of parameters

Topics: Physics, Condensed Matter, Physics, PHYSICS, CONDENSED MATTER, 2504 Electronic, Optical and Magnetic Materials, 3104 Condensed Matter Physics
Publisher: American Physical Society
Year: 2010
DOI identifier: 10.1103/PhysRevB.82.134530
OAI identifier:

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