Nonadiabatic Nonlinear Optics and Quantum Geometry -- Application to the Twisted Schwinger Effect
Mesoscale and Nanoscale Physics
2021-10-15 v4 High Energy Physics - Theory
Nuclear Theory
Abstract
We study the tunneling mechanism of nonlinear optical processes in solids induced by strong coherent laser fields. The theory is based on an extension of the Landau-Zener model with nonadiabatic geometric effects. In addition to the rectification effect known previously, we find two effects, namely perfect tunneling and counterdiabaticity at fast sweep speed. We apply this theory to the twisted Schwinger effect, i.e., nonadiabatic pair production of particles by rotating electric fields, and find a nonperturbative generation mechanism of the opto-valley polarization and photo-current in Dirac and Weyl fermions.
Cite
@article{arxiv.2005.01755,
title = {Nonadiabatic Nonlinear Optics and Quantum Geometry -- Application to the Twisted Schwinger Effect},
author = {Shintaro Takayoshi and Jianda Wu and Takashi Oka},
journal= {arXiv preprint arXiv:2005.01755},
year = {2021}
}
Comments
24 pages, Accepted by SciPost