SKM 2021 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 20: Quantum Dots and Wires (joint session HL/TT)

TT 20.10: Talk

Thursday, September 30, 2021, 16:15–16:30, H4

Emission Time Statistics of a driven Single-Electron Transistor — •Johannes C. Bayer¹, Fredrik Brange², Adrian Schmidt¹, Timo Wagner¹, Christian Flindt², and Rolf J. Haug¹ — ¹Institut für Festkörperphysik, Leibniz Universität Hannover, Germany — ²Department of Applied Physics, Aalto University, Finland

Precisely controllable single particle sources are an essential part of different quantum technologies operating at fixed clock cycles. A high level of accuracy in the time domain thereby requires detailed understanding of the interplay between an external drive and the response of the single particle source [1,2]. We here present the influence of periodically modulated tunneling rates on the emission time statistics of electrons emitted from a single-electron transistor (SET) [3]. A highly sensitive charge detector allows to detect tunneling events in real-time. By ramping up the driving frequency from slower to faster than the electron tunneling rate, the response of the SET undergoes a transition from adiabatic to non-adiabatic dynamics. This transition is accompanied by significant changes in the emission time statistics, which can be visualized in the waiting time distribution and is well described by our detailed theory.

[1] T. Wagner, et. al., Nat. Phys. 15, 330-334 (2019).

[2] R. Hussein, et. al., Phys. Rev. Lett. 125, 206801 (2020).

[3] F. Brange, et. al., Sci. Adv. 7, eabe0793 (2021).