Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-03-11
Phys. Rev. B 84, 104527 (2011)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
16 pages, 8 figures
Scientific paper
10.1103/PhysRevB.84.104527
We present a detailed theoretical analysis of a multi-level quantum system coupled to two radiation fields and subject to decoherence. We concentrate on an effect known from quantum optics as the Autler-Townes splitting, which has been recently demonstrated experimentally [M. A. Sillanpaa et al., Phys. Rev. Lett. 103, 193601 (2009)] in a superconducting phase qubit. In the three-level approximation, we derive analytical solutions and describe how they can be used to extract the decoherence rates and to account for the measurement data. Better agreement with the experiment can be obtained by extending this model to five levels. Finally, we investigate the stationary states created in the experiment and show that their structure is close to that of dark states.
Altomare Fabio
Cicak Katarina
Hakonen Pertti J.
Li Jian
Paraoanu Gh.- S.
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