By exact numerical and master equation approaches, we show that a central spin-1/2 can be configured to probe internal bath dynamics. System-bath interactions cause Rabi oscillations in the detector and periodic behavior of fidelity. This period is highly sensitive to the strength of the bath self-interactions, and can be used to calculate the intra-bath coupling.
Cite
@article{arxiv.0705.4018,
title = {Probing internal bath dynamics by a Rabi oscillator-based detector},
author = {Murat Cetinbas and Joshua Wilkie},
journal= {arXiv preprint arXiv:0705.4018},
year = {2009}
}