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 indicates that the role of thermal fields in resonant cavity QED can be studied in detail using superconducting circuits.
@article{arxiv.0911.3797,
title = {Thermal Excitation of Multi-Photon Dressed States in Circuit Quantum Electrodynamics},
author = {J. M. Fink and M. Baur and R. Bianchetti and S. Filipp and M. Göppl and P. J. Leek and L. Steffen and A. Blais and A. Wallraff},
journal= {arXiv preprint arXiv:0911.3797},
year = {2009}
}
Comments
ArXiv version of manuscript to be published in the Physica Scripta topical issue on the Nobel Symposium 141: Qubits for Future Quantum Computers(2009), 13 pages, 6 figures, hi-res version at http://qudev.ethz.ch/content/science/PubsPapers.html