Comment on "Spin-split two-dimensional electron gas perturbed by intense terahertz laser field"

TL;DR

This paper critiques a previous study by identifying errors in the foundational wavefunctions used, emphasizing the importance of correct basis functions in modeling spin-split two-dimensional electron gases under intense terahertz laser fields.

Contribution

It corrects the wavefunctions used in a prior work, providing the accurate basis for future research on spin-split electron gases under strong laser perturbations.

Findings

Incorrect wavefunctions identified in previous work

Provision of correct time-dependent wavefunctions

Implications for modeling spin-split electron gases

Abstract

We show that the time-dependent wavefunctions which serve as basis of the whole paper of Xu [Phys. Rev. B {\bf 70}, 193301 (2004)] are incorrect and point out the right ones.