Attochaos I: The classically chaotic postcursor of high harmonic generation

by Dr. Jonathan Berkheim

Department of Chemical and Biological Physics, Weizmann Institute

at Condensed Matter Seminar

Mon, 17 Jun 2024, 11:10
Sacta-Rashi Building for Physics (54), room 207

Abstract

Attosecond physics provides unique insights into light-matter interaction on ultrafast time scales. Its core phenomenon, High Harmonic Generation (HHG), is often described by a classical recollision model, the simple-man or three-step model, where the atomic potential is disregarded. Many features are already well explained using this model; however, the simplicity of the model does not allow the possibility of classical chaotic motion. We show that beyond this model, classical chaotic motion does exist albeit on timescales that are generally longer than the first recollision time. Chaos is analyzed using tools from the theory of dynamical systems, such as Lyapunov exponents and stroboscopic maps. The calculations are done for a one-dimensional Coulomb potential subjected to a linearly polarized electric field.

Created on 11-06-2024 by Naamneh, Muntaser (mnaamneh)
Updaded on 11-06-2024 by Naamneh, Muntaser (mnaamneh)