Rabi oscillations of a qubit coupled to a two-level system
Mesoscale and Nanoscale Physics
2009-11-11 v1 Superconductivity
Abstract
The problem of Rabi oscillations in a qubit coupled to a fluctuator and in contact with a heath bath is considered. A scheme is developed for taking into account both phase and energy relaxation in a phenomenological way, while taking full account of the quantum dynamics of the four-level system subject to a driving AC field. Significant suppression of the Rabi oscillations is found when the qubit and fluctuator are close to resonance. The effect of the fluctuator state on the read-out signal is discussed. This effect is shown to modify the observed signal significantly. This may be relevant to recent experiments by Simmonds et al. [Phys. Rev. Lett. 93, 077003 (2004)].
Cite
@article{arxiv.cond-mat/0501455,
title = {Rabi oscillations of a qubit coupled to a two-level system},
author = {Y. M. Galperin and D. V. Shantsev and J. Bergli and B. L. Altshuler},
journal= {arXiv preprint arXiv:cond-mat/0501455},
year = {2009}
}
Comments
4 pages, 4 figures