Spectroscopy of a Cooper-Pair box in the Autler-Townes configuration

Details Spectroscopy of a Cooper-Pair box in the Autler-Townes configuration Spectroscopy of a Cooper-Pair box in the Autler-Townes configuration

2005-10-04

arxiv.org/abs/cond-mat/0510087v2

Phys. Rev. B 74, 094510 (2006)

Physics

Condensed Matter

Superconductivity

13 pages, 7 figures. v2: Revised version after referee comments. Accepted for publication by Physical Review B

Scientific paper

10.1103/PhysRevB.74.094510

A theoretical spectroscopic analysis of a microwave driven superconducting charge qubit (Cooper-pair box coupled) to an RLC oscillator model is performed. By treating the oscillator as a probe through the backreaction effect of the qubit on the oscillator circuit, we extract frequency splitting features analogous to the Autler-Townes effect from quantum optics, thereby extending the analogies between superconducting and quantum optical phenomenology. These features are found in a frequency band that avoids the need for high frequency measurement systems and therefore may be of use in qubit characterization and coupling schemes. In addition we find this frequency band can be adjusted to suit an experimental frequency regime by changing the oscillator frequency.

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