Large coupling-strength expansion of the Møller-Plesset adiabatic connection: From paradigmatic cases to variational expressions for the leading terms

Timothy J. Daas, Juri Grossi, Stefan Vuckovic, Ziad H. Musslimani, Derk P. Kooi, Michael Seidl, Klaas J.H. Giesbertz, Paola Gori-Giorgi*

*Corresponding author for this work

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Abstract

We study in detail the first three leading terms of the large coupling-strength limit of the adiabatic connection that has as weak-interaction expansion the Møller-Plesset perturbation theory. We first focus on the H atom, both in the spin-polarized and the spin-unpolarized cases, reporting numerical and analytical results. In particular, we derive an asymptotic equation that turns out to have simple analytical solutions for certain channels. The asymptotic H atom solution for the spin-unpolarized case is then shown to be variationally optimal for the many-electron spin-restricted closed-shell case, providing expressions for the large coupling-strength density functionals up to the third leading order. We also analyze the H2 molecule and the uniform electron gas.

Original languageEnglish
Article number214112
Pages (from-to)1-15
Number of pages15
JournalJournal of Chemical Physics
Volume153
Issue number21
Early online date4 Dec 2020
DOIs
Publication statusPublished - 7 Dec 2020

Funding

Financial support from the Netherlands Organisation for Scientific Research under Vici Grant No. 724.017.001, the European Research Council under H2020/ERC Consolidator Grant corr-DFT (Grant No. 648932), and H2020/MSCA-IF “SCP-Disorder” (Grant No. 797247) is acknowledged. S.V. acknowledges funding from the Rubicon project (Grant No. 019.181EN.026), which is financed by the Netherlands Organisation for Scientific Research (NWO).

FundersFunder number
Horizon 2020 Framework Programme648932, 797247
European Research Council019.181EN.026
Nederlandse Organisatie voor Wetenschappelijk Onderzoek724.017.001

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