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- W3213553829 abstract "Methods for solving the Schrödinger equation without approximation are in high demand but are notoriously computationally expensive. In practical terms, there are just three primary factors that currently limit what can be achieved: 1) system size/dimensionality; 2) energy level excitation; and 3) numerical convergence accuracy. Broadly speaking, current methods can deliver on any two of these three goals, but achieving all three at once remains an enormous challenge. In this paper, we shall demonstrate how to hit the trifecta in the context of molecular vibrational spectroscopy calculations. In particular, we compute the lowest 1000 vibrational states for the six-atom acetonitrile molecule (CH3CN), to a numerical convergence of accuracy 10-2 cm-1 or better. These calculations encompass all vibrational states throughout most of the dynamically relevant range (i.e., up to ∼4250 cm-1 above the ground state), computed in full quantum dimensionality (12 dimensions), to near spectroscopic accuracy. To our knowledge, no such vibrational spectroscopy calculation has ever previously been performed." @default.
- W3213553829 created "2021-11-22" @default.
- W3213553829 creator A5068711194 @default.
- W3213553829 creator A5070824562 @default.
- W3213553829 date "2021-11-11" @default.
- W3213553829 modified "2023-09-24" @default.
- W3213553829 title "Hitting the Trifecta: How to Simultaneously Push the Limits of Schrödinger Solution with Respect to System Size, Convergence Accuracy, and Number of Computed States" @default.
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- W3213553829 doi "https://doi.org/10.1021/acs.jctc.1c00824" @default.
- W3213553829 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34761945" @default.
- W3213553829 hasPublicationYear "2021" @default.
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