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



Niklas Dittmann

Forschungszentrum Jülich

RWTH Aachen University

Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik

Janine Splettstoesser

Chalmers, Mikroteknologi och nanovetenskap, 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,


Nanovetenskap och nanoteknik (SO 2010-2017, EI 2018-)


Grundläggande vetenskaper


Annan fysik

Den kondenserade materiens fysik



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