Abstract
The present numerical, time-dependent density-functional study of a He atom interacting with strong, oscillating magnetic fields shows that this scenario is quite different from the case of a laser electric field--He atom interaction. Signatures of sluggish electron dynamics are found in this study, while through a mechanical analogy the flow of electron density under such conditions has been explained. These calculations take into account both exchange and correlation. Through several calculated dynamical quantities, we have shown that, in contrast to the case of the (one-electron) H atom studied earlier, the nonlinear dependence of interelectronic repulsions (a combination of Coulomb, exchange and correlation terms) on the magnetic field plays a significant role in this strong-field electron dynamics in the He atom, which cannot be explained by a perturbative approach.
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