We perform a nonperturbative analysis of a charge qubit in a double quantum dot structure coupled to its detector. We show that strong detector-dot interaction tends to slow down and halt coherent oscillations. The transitions to a classical and a low-temperature quantum overdamping (Zeno) regime are studied. In the latter, the physics of the dissipative phase transition competes with the effective shot noise.
@article{arxiv.cond-mat/0505132,
title = {Strong coupling of a qubit to shot noise},
author = {Udo Hartmann and Frank K. Wilhelm},
journal= {arXiv preprint arXiv:cond-mat/0505132},
year = {2013}
}