Decoherence, Autler-Townes effect, and dark states in two-tone driving of a three-level superconducting system

Published

September 30, 2011

Author(s)

Jian Li, G.S. Paraoanu, Katarina Cicak, Fabio Altomare, Jae Park, Raymond Simmonds, Mika A. Sillanpaa, Pertti Hakonen

Abstract

We present a detailed theoretical and experimental study of a multi-level quantum system coupled to two radiation ¯elds and subject to decoherence. We concentrate on an e®ect known from quantum optics as the Autler-Townes splitting, which has been recently demonstrated experimentally [M. A. SillanpÄaÄa et al., Phys. Rev. Lett. 103, 193601 (2009)] in such a system (a superconducting phase qubit). In the three-level approximation, we derive analytical solutions and show how they can be used to account for the measurement data. In addition, a more complete 5-level model is solved numerically and it is shown to provide excellent agreement with the experiment. Finally, we show that stationary states, with a structure close to ideal dark states, are created in the experiment.

Citation

Physical Review B

Volume

84

Pub Type

Journals

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DOI Link

Keywords

superconducting qubits, Autler-Townes

Citation

Li, J. , Paraoanu, G. , Cicak, K. , Altomare, F. , Park, J. , Simmonds, R. , Sillanpaa, M. and Hakonen, P. (2011), Decoherence, Autler-Townes effect, and dark states in two-tone driving of a three-level superconducting system, Physical Review B, [online], https://doi.org/10.1103/PhysRevB.84.104527 (Accessed October 14, 2025)