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Frozen Gaussian wavepackets for simulations of molecular dynamics including quantum effects require specification of the widths of the complex Gaussian functions, which may be viewed as parameters. Motivated by the standardized basis sets used in electronic structure theory, we develop a scheme for optimizing the width parameters for frozen Gaussian nuclear basis functions. The optimization approach...
We investigate the feasibility of reparameterized multi-reference semiempirical methods in the context of direct wavepacket dynamics, where the electronic and nuclear Schrodinger equations are solved simultaneously. Using a very limited set of ab initio and experimental data, we refine the semiempirical parameters for benzene. The resulting reparameterized semiempirical method is compared to ab initio...
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