Autler-Townes effect in a superconducting three-level system

Mika A. Sillanpää, Jian Li, Katarina Cicak, Fabio Altomare, Jae I. Park, Raymond W. Simmonds, G. S. Paraoanu, Pertti J. Hakonen

Research output: Contribution to journalArticlepeer-review

137 Citations (Scopus)


When a three-level quantum system is irradiated by an intense coupling field resonant with one of the three possible transitions, the absorption peak of an additional probe field involving the remaining level is split. This process is known in quantum optics as the Autler-Townes effect. We observe these phenomena in a superconducting Josephson phase qubit, which can be considered an "artificial atom" with a multilevel quantum structure. The spectroscopy peaks can be explained reasonably well by a simple three-level Hamiltonian model. Simulation of a more complete model (including dissipation, higher levels, and cross coupling) provides excellent agreement with all of the experimental data.

Original languageEnglish
Article number193601
JournalPhysical Review Letters
Issue number19
Publication statusPublished - 2 Nov 2009
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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