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HL: Fachverband Halbleiterphysik
HL 17: Quantum Dots and Wires: Rings, Wires and Transport
HL 17.7: Vortrag
Dienstag, 10. März 2026, 11:15–11:30, POT/0251
Quantum stochastic resonance in a single-photon emitter — •H. Mannel1, J. Zöllner1, E. Kleinherbers2, M. Zöllner1, N. Schwarz1, F. Rimek1, A. Ludwig3, A. Lorke1, J. König1, and M. Geller1 — 1Faculty of Physics and CENIDE, University of Duisburg-Essen, 47057 Duisburg, Germany — 2Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA — 3Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum, 44780 Bochum, Germany
Classical stochastic resonance (SR) describes how noise can enhance the response of a driven bistable system. Recently, it has been extended to the quantum regime, where fluctuations originate from single tunneling events [1]. Building on optical real-time charge detection in self-assembled quantum dots [2], we demonstrate quantum stochastic resonance in a single InAs/GaAs quantum dot, weakly tunnel-coupled to an electron reservoir. Periodic modulation of the gate voltage synchronizes the electron tunneling with the external drive, while resonance fluorescence provides a fully optical, high-resolution readout of the charge state. From the full counting statistics of the tunneling events, we observe a pronounced narrowing of the distribution at the resonance condition, marking the transition from stochastic to increasingly deterministic transport [3]. [1] T. Wagner et al., Nat. Phys. 15, 330 (2019). [2] A. Kurzmann et al., Phys. Rev. Lett. 122, 247403 (2019). [3] H. Mannel et al., Commun Phys 8, 404 (2025).
Keywords: Stochastic resonance; Resonance fluorescence; Quantum dot; Telegraph signal; Faktorial cumulants