Year: 2025
Type: article
Abstract: In Frozen Density Embedding Theory (FDET) [T. A. Wesolowski, Phys. Rev. A 77, 012504 (2008)], the total N-electron density is represented as a sum of two components ρ1 and ρ2, where ρ1 is obtained from a Schrödinger-like N'-electron eigenvalue equation with N' < N and ρ2 is an arbitrary non-negative real function integrating with respect to N - N'. It is shown that the exact total ground-state electron density ρvo cannot be obtained from FDET even if ρ2 is piecewise equal to ρvo (i.e., equal to ρvo on some measurable volume element). The result is discussed in the context of subsystem approach in density functional theory, pseudopotential theory, and embedding potentials derived from inverted Kohn-Sham equation.
Source: The Journal of Chemical Physics
DOI: 10.1063/5.0279936
Author: Tomasz A. Wesolowski
Institution: University of Geneva
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,500
OpenAlex ID: W4415466453