Bonn 2025 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 41: Ultracold Matter (Fermions) II (joint session Q/A)

A 41.6: Vortrag

Freitag, 14. März 2025, 12:30–12:45, HS V

Floquet-engineered pair transport in the Fermi Hubbard model — Friedrich Hübner¹, Christoph Dauer², Sebastian Eggert², Corinna Kollath¹, and •Ameneh Sheikhan¹ — ¹Physikalisches Institut, University of Bonn, Nussallee 12, 53115 Bonn, Germany — ²Physics Department and Research Center OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany

We investigate the transport properties of a Fermi-Hubbard chain with an impurity which is formed by a site with a periodically modulated chemical potential. We determine the transmission through this impurity in dependence of the modulation frequency and strength for a single particle and a pair of fermions. We find that the pair transmission has a very distinct behaviour from the single particle transmission. Different situations can occur, where only the single particle or the pair are transmitted or filtered out.

Keywords: Fermi Hubbard model; Transport; Floquet systems