Examining the Nonlinear Response of Quantum Electrons with the Assistance of Wigner Distribution Function

Examining the Nonlinear Response of Quantum Electrons with the Assistance of Wigner Distribution Function

Zhandos Moldabekov

z.moldabekov@hzdr.de

Center of Advanced Systems Understanding at Helmholtz-Zentrum Dresden-Rossendorf, Germany

A linear response of quantum electrons is well studied and for that well developed theoretical and computational methods computing the linear response properties are available. However, recent introduction of THz lasers and the novel seeding technique to reach high intensities [1] allow us to generate nonlinear response of quantum electrons in extended systems. Therefore, in this talk the results will be presented for the non-linear density response of quantum electrons and the applicability of various approximations and methods for extended systems will be discussed [3-5]. The utility of the quantum Wigner distribution function for the analytic solution of the non-linear response problem of arbitrary order will be presented [5].

[1] B.K. Ofori-Okai, et al., J. Inst13, P06014 (2018).
[2] T Kluge, et al., Phys. Rev. X 8, 031068 (2018).
[3] Z. Moldabekov, Jan Vorberger, and Tobias Dornheim, Journal of Chemical Theory and Computation 18, 2900–2912 (2022).
[4] T.Dornheim, M. Boehme, Z. Moldabekov, J. Vorberger, and M. Bonitz, Phys. Rev. Research 3, 033231 (2021).
[5] P. Tolias, T. Dornheim, Z. Moldabekov, and J. Vorberger, EPL 142 , 44001 (2023).