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- W4366999762 abstract "Quantum-mechanical (QM) and classical embedding models approximate a supermolecular quantum chemical calculation. This is particularly useful when the supermolecular calculation has a size that is out of reach for present QM models. Although QM and classical embedding methods share the same goal, they approach this goal from different starting points. In this study, we compare the polarizable embedding (PE) and frozen-density embedding (FDE) models. The former is a classical embedding model, whereas the latter is a density-based QM embedding model. Our comparison focuses on solvent effects on optical spectra of solutes. This is a typical scenario where super-system calculations including the solvent environment become prohibitively large. We formulate a common theoretical framework for PE and FDE models and systematically investigate how PE and FDE approximate solvent effects. Generally, differences are found to be small, except in cases where electron spill-out becomes problematic in the classical frameworks. In these cases, however, atomic pseudopotentials can reduce the electron-spill-out issue." @default.
- W4366999762 created "2023-04-27" @default.
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- W4366999762 date "2023-04-23" @default.
- W4366999762 modified "2023-09-26" @default.
- W4366999762 title "Theoretical and numerical comparison of quantum- and classical embedding models for optical spectra" @default.
- W4366999762 doi "https://doi.org/10.48550/arxiv.2304.11682" @default.
- W4366999762 hasPublicationYear "2023" @default.
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