Stark Effect and Generalized Bloch-Siegert Shift in a Strongly Driven Two-Level System

Tuorila, Jani; Silveri, Matti; Sillanpää, Mika A.; Thuneberg, Erkki; Makhlin, Yuriy; Hakonen, Pertti

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Stark Effect and Generalized Bloch-Siegert Shift in a Strongly Driven Two-Level System

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Title:	Stark Effect and Generalized Bloch-Siegert Shift in a Strongly Driven Two-Level System
Author(s):	Tuorila, Jani ; Silveri, Matti ; Sillanpää, Mika A. ; Thuneberg, Erkki ; Makhlin, Yuriy ; Hakonen, Pertti
Date:	2010
Language:	en
Pages:	257003/1-4
Department:	Teknillisen fysiikan laitos Department of Applied Physics
Series:	Physical Review Letters, Volume 105, Issue 25
ISSN:	0031-9007 (printed)
DOI-number:	10.1103/physrevlett.105.257003
Subject:	Physics
Keywords:	quantum dots, Josephson qubits, superconductivity, oscillatory microwave fields
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Citation: Tuorila, Jani & Silveri, Matti & Sillanpää, Mika A. & Thuneberg, Erkki & Makhlin, Yuriy & Hakonen, Pertti. 2010. Stark Effect and Generalized Bloch-Siegert Shift in a Strongly Driven Two-Level System. Physical Review Letters. Volume 105, Issue 25. 257003/1-4. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.105.257003.
Abstract: A superconducting qubit was driven in an ultrastrong fashion by an oscillatory microwave field, which was created by coupling via the nonlinear Josephson energy. The observed Stark shifts of the “atomic” levels are so pronounced that corrections even beyond the lowest-order Bloch-Siegert shift are needed to properly explain the measurements. The quasienergies of the dressed two-level system were probed by resonant absorption via a cavity, and the results are in agreement with a calculation based on the Floquet approach.
Rights: © 2010 American Physical Society (APS). This is the accepted version of the following article: Tuorila, Jani & Silveri, Matti & Sillanpää, Mika A. & Thuneberg, Erkki & Makhlin, Yuriy & Hakonen, Pertti. 2010. Stark Effect and Generalized Bloch-Siegert Shift in a Strongly Driven Two-Level System. Physical Review Letters. Volume 105, Issue 25. 257003/1-4. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.105.257003, which has been published in final form at http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.105.257003
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