An Application of Transfer Hamiltonian Quantum Mechanics to Multi-Scale Modeling

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dc.creatorMallik, Aditi
dc.creatorTaylor, Carlos E.
dc.creatorRunge, Keith
dc.creatorDufty, James W.
dc.date2004-03-03
dc.date.accessioned2026-07-07T05:51:26Z
dc.date.available2026-07-07T05:51:26Z
dc.descriptionIn quantum/classical (QM/CM) partitioning methods for multi-scale modeling, one is often forced to introduce uncontrolled phenomenological effects of the environment (CM) in the quantum (QM) domain as ab initio quantum calculations are computationally too intensive to be applied to the whole sample. We propose a method, in which two qualitatively different components of the information about the state of the CM region are incorporated into the QM calculations. First, pseudoatoms constructed to describe the chemistry of the nearest neighbor exchange interactions replace the atoms at the boundary of the CM and the QM regions. Second, the remaining effect of the CM bulk environment due to long-range Coulombic interactions is modeled in terms of dipoles. We have tested this partitioning method in a silica nanorod and a 3-membered silica ring for which ab initio quantum data for the whole system is available to assess the quality of the proposed partitioning method.
dc.description17 pages, 7 figures, submitted to International Journal of Quantum Chemistry
dc.identifierhttps://arxiv.org/abs/physics/0403028
dc.identifierhttp://arxiv.org/abs/physics/0403028
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/85988
dc.subjectChemical Physics
dc.titleAn Application of Transfer Hamiltonian Quantum Mechanics to Multi-Scale Modeling
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