Salvato in:
| Autore principale: | |
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| Natura: | Preprint |
| Pubblicazione: |
2018
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/1804.00252 |
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Sommario:
- In orbital-free density functional theory (OFDFT), an equation exists for $ψ= \sqrt n$, the square root of the ground state electron density $n$. We show that $ψ$ cannot be expanded as a linear combination of elements of a complete set of basis functions except in the case of one or two electron systems. This is unlike the case for the ground state of a system of identical bosons in which the square root of the ground state bosonic density can have an expansion as a linear combination of elements of a complete set of basis functions.