Dresden 2026 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 41: Quantum Dots and Point Contacts (joint session TT/HL)

HL 41.4: Vortrag

Donnerstag, 12. März 2026, 11:45–12:00, HSZ/0101

Tunneling resonances through periodically driven quantum dots — •Jan Mathis Giesen, Daniel Weber, and Sebastian Eggert — RPTU University Kaiserslautern-Landau, D-67663 Kaiserslautern, Germany

We consider a general setup of transport through a time-periodically driven quantum dot using Floquet theory. An analytic non-equilibrium solution of the problem is developed which allows the analytic prediction and analysis of the tunneling amplitudes as a function of frequency, driving amplitude, and energy levels on the dot. One main result is the discovery of a previously unknown resonant switching effect, where a very small control signal on a weakly connected quantum dot can induce perfect transmission. This opens the door for the design of novel efficient nano-electronic devices. The results are also relevant for corresponding setups using magnonic systems, photonic waveguides, or ultra-cold gases in optical lattices.

Keywords: Transport; Transport resonances; Floquet; Tunneling; Quantum dot