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arXiv · 2606.01321

Existence of Solutions for time-dependent fractional Kohn-Sham Equations

Sébastien Breteaux·Michele Fantechi·Jérémy Faupin
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Abstract

We consider time-dependent Kohn-Sham equations in dimension $3$ with a fractional dispersion relation $(1-Δ)^s$, $s\in(0,\frac32)$, and a class of interaction terms including, in particular, external potentials, internal potentials associated to Hartree-type non-linearities, and exchange terms described by energy subcritical pure-power non-linearities. We prove the local existence of weak solutions in $H^s$ using an approximation procedure regularizing the non-linearities. Assuming that the interaction energies can be controlled by the kinetic energy, we show that the solutions can be extended to global solutions using energy estimates. If $s\in[1,\frac32)$, we establish in addition the well-posedness of the time-dependent Kohn-Sham equations using Strichartz estimates.

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Sébastien Breteaux, Michele Fantechi, Jérémy Faupin. 2026-05-31. Existence of Solutions for time-dependent fractional Kohn-Sham Equations. https://arxiv.org/abs/2606.01321

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