Dresden 2026 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 30: Nonequilibrium Quantum Systems I (joint session TT/DY)

DY 30.8: Vortrag

Mittwoch, 11. März 2026, 11:30–11:45, CHE/0091

Scattering in periodic fields: Floquet resonances — •Sebastian Eggert, Christoph Dauer, and Axel Pelster — University of Kaiserslautern-Landau (RPTU)

An alternative mechanism of tuning many-body interactions in atomic systems is proposed, which is based on dynamically creating Floquet bound states using time-periodic fields. By developing a Floquet-scattering theory we show that sharp Floquet resonances occur at which the effective interaction can be tuned to very large attractive or repulsive values. The resulting predictions explain recent experimental data and provide additional tuning possibilities. Analytic predictions are given for adjusting amplitude, frequency and mean of the applied oscillating field in order to to accurately choose location and width of scattering resonances over a wide range. This paves the road to a versatile toolbox of tailored interactions in setups with multiple atomic species.

Keywords: Floquet theory; Scattering theory; Feshbach resonances; Ultracold collisions; Tunable interactions