Multi-component symmetry-projected approach for molecular ground state correlations
dc.citation.articleNumber | 204102 | |
dc.citation.issueNumber | 20 | |
dc.citation.journalTitle | The Journal of Chemical Physics | |
dc.citation.volumeNumber | 139 | |
dc.contributor.author | Jiménez-Hoyos, Carlos A. | |
dc.contributor.author | Rodríguez-Guzmán, R. | |
dc.contributor.author | Scuseria, Gustavo E. | |
dc.date.accessioned | 2017-05-04T19:43:54Z | |
dc.date.available | 2017-05-04T19:43:54Z | |
dc.date.issued | 2013 | |
dc.description.abstract | The symmetry-projected Hartree–Fock ansatz for the electronic structure problem can efficiently account for static correlation in molecules, yet it is often unable to describe dynamic correlation in a balanced manner. Here, we consider a multi-component, systematically improvable approach, that accounts for all ground state correlations. Our approach is based on linear combinations of symmetry-projected configurations built out of a set of non-orthogonal, variationally optimized determinants. The resulting wavefunction preserves the symmetries of the original Hamiltonian even though it is written as a superposition of deformed (broken-symmetry) determinants. We show how short expansions of this kind can provide a very accurate description of the electronic structure of simple chemical systems such as the nitrogen and the water molecules, along the entire dissociation profile. In addition, we apply this multi-component symmetry-projected approach to provide an accurate interconversion profile among the peroxo and bis(μ-oxo) forms of [Cu2O2]2+, comparable to other state-of-the-art quantum chemical methods. | |
dc.identifier.citation | Jiménez-Hoyos, Carlos A., Rodríguez-Guzmán, R. and Scuseria, Gustavo E.. "Multi-component symmetry-projected approach for molecular ground state correlations." <i>The Journal of Chemical Physics,</i> 139, no. 20 (2013) American Institute of Physics: https://doi.org/10.1063/1.4832476. | |
dc.identifier.doi | https://doi.org/10.1063/1.4832476 | |
dc.identifier.uri | https://hdl.handle.net/1911/94177 | |
dc.language.iso | eng | |
dc.publisher | American Institute of Physics | |
dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | |
dc.title | Multi-component symmetry-projected approach for molecular ground state correlations | |
dc.type | Journal article | |
dc.type.dcmi | Text | |
dc.type.publication | publisher version |
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