Spectral Properties of Stochastic Resonance in Quantum Transport

verfasst von
Robert Hussein, Sigmund Kohler, Johannes C. Bayer, Timo Wagner, Rolf J. Haug
Abstract

We investigate theoretically and experimentally stochastic resonance in a quantum dot coupled to electron source and drain via time-dependent tunnel barriers. A central finding is a transition visible in the current noise spectrum as a bifurcation of a dip originally at zero frequency. The transition occurs close to the stochastic resonance working point and relates to quantized pumping. For the evaluation of power spectra from measured waiting times, we generalize a result from renewal theory to the ac-driven case. Moreover, we develop a master equation method to obtain phase-averaged current noise spectra for driven quantum transport.

Organisationseinheit(en)
Institut für Festkörperphysik
QuantumFrontiers
Externe Organisation(en)
Universität Konstanz
Spanish National Research Council (CSIC)
Typ
Artikel
Journal
Physical review letters
Band
125
ISSN
0031-9007
Publikationsdatum
10.11.2020
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Allgemeine Physik und Astronomie
Elektronische Version(en)
https://doi.org/10.48550/arXiv.2006.13773 (Zugang: Offen)
https://doi.org/10.1103/PhysRevLett.125.206801 (Zugang: Geschlossen)