Journal
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
Volume 9, Issue 3, Pages 1394-1401Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ct300902c
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Funding
- Swiss National Science Foundation
- Vanier Canada Graduate Scholarships
- NSERC
- FWO-Flanders
- research council of Ghent University
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We propose an approach to the electronic structure problem based on noninteracting electron pairs that has similar computational cost to conventional methods based on noninteracting electrons. In stark contrast to other approaches, the wave function is an antisymmetric product of nonorthogonal geminals, but the geminals are structured so the projected Schrodinger equation can be solved very efficiently. We focus on an approach where, in each geminal, only one of the orbitals in a reference Slater determinant is occupied. The resulting method gives good results for atoms and small molecules. It also performs well for a prototypical example of strongly correlated electronic systems, the hydrogen atom chain.
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