We present a theoretical study of the detection of the decay time scales for a single-level quantum dot by means of a capacitively coupled sensor dot, which acts as an electrometer. We investigate the measurement back-action on the quantum-dot decay rates and elucidate its mechanism. We explicitly show that the setup can be used to measure the bare quantum-dot relaxation rates by choosing gate pulses that minimize the back-action. Interestingly, we find that besides the charge relaxation rate, also the rate associated to the fermion parity in the dot can be accessed with this setup.
@article{arxiv.1403.1141,
title = {Detection of the relaxation rates of an interacting quantum dot by a capacitively coupled sensor dot},
author = {Jens Schulenborg and Janine Splettstoesser and Michele Governale and L. Debora Contreras-Pulido},
journal= {arXiv preprint arXiv:1403.1141},
year = {2014}
}