Details
| Original language | English |
|---|---|
| Article number | 206801 |
| Journal | Physical review letters |
| Volume | 125 |
| Issue number | 20 |
| Publication status | Published - 10 Nov 2020 |
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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Physical review letters, Vol. 125, No. 20, 206801, 10.11.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Spectral Properties of Stochastic Resonance in Quantum Transport
AU - Hussein, Robert
AU - Kohler, Sigmund
AU - Bayer, Johannes C.
AU - Wagner, Timo
AU - Haug, Rolf J.
N1 - Funding Information: This work was supported by the Zukunftskolleg of the University of Konstanz and by the Spanish Ministry of Science, Innovation, and Universities under Grant No. MAT2017-86717-P and the CSIC Research Platform on Quantum Technologies PTI-001, by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy—EXC-2123 Quantum Frontiers—390837967, and by the State of Lower Saxony, Germany, via Hannover School for Nanotechnology and School for Contacts in Nanosystems.
PY - 2020/11/10
Y1 - 2020/11/10
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85096114591&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2006.13773
DO - 10.48550/arXiv.2006.13773
M3 - Article
C2 - 33258637
AN - SCOPUS:85096114591
VL - 125
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 20
M1 - 206801
ER -