Equilibrium finite-frequency noise of an interacting mesoscopic capacitor studied in time-dependent density functional theory
Paper i proceeding, 2018

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.

quantum dot

time-dependent density-functional theory

single-electron source

noise

Författare

Niklas Dittmann

Forschungszentrum Jülich

RWTH Aachen University

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Janine Splettstoesser

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Nicole Helbig

Forschungszentrum Jülich

Journal of Physics: Conference Series

17426588 (ISSN) 17426596 (eISSN)

Vol. 969 1 012145

28th International Conference on Low Temperature Physics (LT28)
Gothenburg, Sweden,

Styrkeområden

Nanovetenskap och nanoteknik (2010-2017)

Fundament

Grundläggande vetenskaper

Ämneskategorier

Annan fysik

Den kondenserade materiens fysik

DOI

10.1088/1742-6596/969/1/012145

Mer information

Senast uppdaterat

2019-01-18