SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 24: Quantum Dots: Transport (joint session HL/TT)

TT 24.8: Vortrag

Dienstag, 28. März 2023, 11:45–12:00, POT 151

Manipulation of temporal correlations in single-electron tunneling — •Johannes C. Bayer, Adrian Schmidt, Timo Wagner, and Rolf J. Haug — Institut für Festkörperphysik, Leibniz Universität Hannover

Precisely timed single-particle operations are of critical importance for quantum technologies operating at fixed clock cycles. A detailed understanding of the interplay between an external drive and the response of the single-particle source is essential for achieving and improving the accuracy in the time domain. We here demonstrate a high level of control over the time domain of a driven single electron transistor (SET). Using a gate defined quantum dot connected to a highly sensitive charge detector [1] allows detecting electrons tunneling into and out of the SET in real-time [2, 3]. The tunneling rates of such devices are controllable by gate voltages. We drive the SET by modulating gate voltages periodically in time and use time-dependent tunneling rates [2] and waiting time distributions [4] to analyze the impact of the driving parameters on temporal correlations in the tunneling times.

[1] J. C. Bayer, T. Wagner, E. P. Rugeramigabo and R. J. Haug, Ann. Phys. 531, 1800393 (2019)

[2] T. Wagner, P. Talkner, J. C. Bayer, E. P. Rugeramigabo, P. Hänggi and R. J. Haug, Nat. Phys. 15, 330-334 (2019)

[3] R. Hussein, S. Kohler, J. C. Bayer, T. Wagner and R. J. Haug, Phys. Rev. Lett. 125, 206801 (2020)

[4] F. Brange, A. Schmidt, J. C. Bayer, T.Wagner, C. Flindt and R. J. Haug, Sci. Adv. 7, eabe0793 (2021)