Regensburg 2025 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 2: Nonequilibrium Quantum Systems (joint session TT/DY)
DY 2.6: Vortrag
Montag, 17. März 2025, 10:45–11:00, H31
Towards Floquet-GW: interacting electrons in time-periodic potentials — •Ayan Pal1,2, Erik G. C. P. Van Loon1,2, and Ferdi Aryasetiawan1 — 1Division of Mathematical Physics, Department of Physics, Lund University, Professorsgatan 1, 223 63, Lund, Sweden — 2NanoLund, Lund University, Professorsgatan 1B, 223 63, Lund, Sweden
The Floquet theory of time-periodic systems provides a middle ground between equilibrium and completely non-equilibrium physics. Here, we study interacting electrons in time-periodic potentials using the combination of Floquet theory and many-body methods such as RPA and GW. We apply these techniques to the electron gas and to lattice models and study the electronic and dielectric properties, for example the appearance of side bands in the spectral functions. These methods have the potential to describe the impact of periodic laser pulses on the plasmonic and optical properties of (moderately) correlated materials.
Keywords: Floquet Theory; GW Method; Plasmon