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• W2963453465 abstract "Feynman and Hibbs were the first to variationally determine an effective potential whose associated classical canonical ensemble approximates the exact quantum partition function. We examine the existence of a map between the local potential and an effective classical potential which matches the exact quantum equilibrium density and partition function. The usefulness of such a mapping rests in its ability to readily improve Born-Oppenheimer potentials for use with classical sampling. We show that such a map is unique and must exist. To explore the feasibility of using this result to improve classical molecular mechanics, we numerically produce a map from a library of randomly generated one-dimensional potential/effective potential pairs then evaluate its performance on independent test problems. We also apply the map to simulate liquid para-hydrogen, finding that the resulting radial pair distribution functions agree well with path integral Monte Carlo simulations. The surprising accessibility and transferability of the technique suggest a quantitative route to adapting Born-Oppenheimer potentials, with a motivation similar in spirit to the powerful ideas and approximations of density functional theory." @default.
• W2963453465 created "2019-07-30" @default.
• W2963453465 creator A5026991176 @default.
• W2963453465 creator A5059699271 @default.
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• W2963453465 date "2013-01-01" @default.
• W2963453465 modified "2023-09-28" @default.
• W2963453465 title "Force-field functor theory: classical force-fields which reproduce equilibrium quantum distributions" @default.
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• W2963453465 doi "https://doi.org/10.3389/fchem.2013.00026" @default.
• W2963453465 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3982527" @default.
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• W2963453465 hasPublicationYear "2013" @default.
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