|Title||Thermal excitation of multi-photon dressed states in circuit quantum electrodynamics |
|Publication Type||Journal Article |
|Year of Publication||2009 |
|Authors||Fink JM, Baur M, Bianchetti R, Filipp S, Goppl M, Leek PJ, Steffen L, Blais A, Wallraff A |
|Journal||PHYSICA SCRIPTA |
|Abstract||The exceptionally strong coupling realizable between superconducting qubits and photons stored in an on-chip microwave resonator allows for the detailed study of matter-light interactions in the realm of circuit quantum electrodynamics (QED). Here we investigate the resonant interaction between a single transmon-type multilevel artificial atom and weak thermal and coherent fields. We explore up to three photon dressed states of the coupled system in a linear response heterodyne transmission measurement. The results are in good quantitative agreement with a generalized Jaynes-Cummings model. Our data indicate that the role of thermal fields in resonant cavity QED can be studied in detail using superconducting circuits.