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• W3159753654 abstract "Accurate quantum chemical methods for the prediction of spin-state energy gaps for strongly correlated systems are computationally expensive and scale poorly with the size of the system. This makes calculations for many experimentally interesting molecules impractical even with abundant computational resources. Previous work has shown that the localized active space (LAS) self-consistent field (SCF) method can be an efficient way to obtain multiconfiguration SCF wave functions of comparable quality to the corresponding complete active space (CAS) ones. To obtain quantitative results, a post-SCF method is needed to estimate the complete correlation energy. One such method is multiconfiguration pair-density functional theory (PDFT), which calculates the energy based on the density and on-top pair density obtained from a multiconfiguration wave function. In this work, we introduce localized-active-space PDFT, which uses a LAS wave function for subsequent PDFT calculations. The method is tested by computing spin-state energies and gaps in conjugated organic molecules and a bimetallic compound and comparing to the corresponding CAS-PDFT values." @default.
• W3159753654 created "2021-05-10" @default.
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• W3159753654 date "2021-04-26" @default.
• W3159753654 modified "2023-10-17" @default.
• W3159753654 title "Localized Active Space Pair-Density Functional Theory" @default.
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• W3159753654 doi "https://doi.org/10.1021/acs.jctc.1c00067" @default.
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