Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 132, Issue 5, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3303203
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Funding
- DOE [DE-AC02-7600515]
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We introduce a geminal-augmented multiconfigurational self-consistent field method for describing electron correlation effects. The approach is based on variational optimization of a MCSCF-type wave function augmented by a single geminal. This wave function is able to account for some dynamic correlation without explicit excitations to virtual molecular orbitals. Test calculations on two-electron systems demonstrate the ability of the proposed method to describe ionic and covalent electronic states in a balanced way, i.e., including the effects of both static and dynamic correlation simultaneously. Extension of the theory to larger systems will potentially provide an alternative to standard multireference methods. (c) 2010 American Institute of Physics. [doi:10.1063/1.3303203]
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