Highly efficient implementation of analytic nonadiabatic derivative couplings within the pseudospectral method

Highly efficient implementation of analytic nonadiabatic derivative couplings within the pseudospectral method

A pseudospectral implementation of nonadiabatic derivative couplings in the Tamm–Dancoff approximation is reported, and the accuracy and efficiency of the pseudospectral nonadiabatic derivative couplings are studied. Our results demonstrate that the pseudospectral method provides mean absolute error...

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Veröffentlicht in:The Journal of chemical physics 2024-02, Vol.160 (8)
Hauptverfasser: Cao, Yixiang, Halls, Mathew D., Friesner, Richard A.
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Couplings
Spectral methods
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Halls, Mathew D.
Friesner, Richard A.
description A pseudospectral implementation of nonadiabatic derivative couplings in the Tamm–Dancoff approximation is reported, and the accuracy and efficiency of the pseudospectral nonadiabatic derivative couplings are studied. Our results demonstrate that the pseudospectral method provides mean absolute errors of 0.2%–1.9%, while providing a significant speedup. Benchmark calculations on fullerenes (Cn, n up to 100) using B3LYP achieved 10- to 15-fold, 8- to 17-fold, and 43- to 75-fold speedups for 6-31G**, 6-31++G**, and cc-pVTZ basis sets, respectively, when compared to the conventional spectral method.
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Spectral methods
title Highly efficient implementation of analytic nonadiabatic derivative couplings within the pseudospectral method
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