MP2[V] - A simple approximation to second-order møller-plesset perturbation theory

Jia Deng, Andrew T.B. Gilbert, Peter M.W. Gill*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    We propose a simplified variant of the dual-basis MP2[K] scheme [ J. Chem. Phys. 2011, 134, 081103 ] that bootstraps a small-basis MP2 result to a large-basis one. This simplified method, which we call MP2[V], assumes the occupied orbitals are adequately described by the smaller basis, and, therefore, only the relaxation of the virtual orbitals is considered when shifting to the larger basis. Numerical tests on several organic reactions and noncovalent interactions show that MP2[V] yields absolute and relative energies that are in excellent agreement with the conventional large-basis MP2 calculations but in a small fraction of the time.

    Original languageEnglish
    Pages (from-to)1639-1644
    Number of pages6
    JournalJournal of Chemical Theory and Computation
    Volume11
    Issue number4
    DOIs
    Publication statusPublished - 14 Apr 2015

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