Equilibrium finite-frequency noise of an interacting mesoscopic capacitor studied in time-dependent density functional theory
Abstract
We calculate the frequency-dependent equilibrium noise of a mesoscopic capacitor in time-dependent density functional theory (TDDFT). The capacitor is modeled as a single-level quantum dot with on-site Coulomb interaction and tunnel coupling to a nearby reservoir. The noise spectra are derived from linear-response conductances via the fluctuation-dissipation theorem. Thereby, we analyze the performance of a recently derived exchange-correlation potential with time-nonlocal density dependence in the finite-frequency linear-response regime. We compare our TDDFT noise spectra with real-time perturbation theory and find excellent agreement for noise frequencies below the reservoir temperature.
Keywords
Cite
@article{arxiv.1802.09830,
title = {Equilibrium finite-frequency noise of an interacting mesoscopic capacitor studied in time-dependent density functional theory},
author = {Niklas Dittmann and Janine Splettstoesser and Nicole Helbig},
journal= {arXiv preprint arXiv:1802.09830},
year = {2018}
}
Comments
to appear in Journal of Physics: Conference Series, 28th International Conference on Low Temperature Physics (LT28)