Spectral Properties of Stochastic Resonance in Quantum Transport

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2020
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Kohler, Sigmund
Wagner, Timo
Haug, Rolf J.
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Physical review letters. American Physical Society. 2020, 125(20), 206801. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.125.206801
Zusammenfassung

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.

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Fachgebiet (DDC)
530 Physik
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Coulomb blockade, Mesoscopics, Stochastic processes, Transport phenomena
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ISO 690HUSSEIN, Robert, Sigmund KOHLER, Johannes BAYER, Timo WAGNER, Rolf J. HAUG, 2020. Spectral Properties of Stochastic Resonance in Quantum Transport. In: Physical review letters. American Physical Society. 2020, 125(20), 206801. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.125.206801
BibTex
@article{Hussein2020-11-13Spect-52306,
  year={2020},
  doi={10.1103/PhysRevLett.125.206801},
  title={Spectral Properties of Stochastic Resonance in Quantum Transport},
  number={20},
  volume={125},
  issn={0031-9007},
  journal={Physical review letters},
  author={Hussein, Robert and Kohler, Sigmund and Bayer, Johannes and Wagner, Timo and Haug, Rolf J.},
  note={Article Number: 206801}
}
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