Dressed Relaxation and Dephasing in a Strongly Driven Two-Level system

Details Dressed Relaxation and Dephasing in a Strongly Driven Two-Level system Dressed Relaxation and Dephasing in a Strongly Driven Two-Level system

2009-05-22

arxiv.org/abs/0905.3674v1

PHYSICAL REVIEW B 81, 024520 (2010)

Physics

Quantum Physics

5 pages, 2 figures

Scientific paper

10.1103/PhysRevB.81.024520

We study relaxation and dephasing in a strongly driven two-level system interacting with its environment. We develop a theory which gives a straightforward physical picture of the complex dynamics of the system in terms of dressed states. In addition to the dressing of the energy diagram, we describe the dressing of relaxation and dephasing. We find a good quantitative agreement between the theoretical calculations and measurements of a superconducting qubit driven by an intense microwave field. The competition of various processes leads to a rich structure in the observed behavior, including signatures of population inversion.

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