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Updated: Feb 6, 2026

Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
Coupled wave-packets for non-adiabatic molecular dynamics: a generalization of Gaussian wave-packet dynamics to
Alexander White1,2, Sergei Tretiak1,2,3, Dmitry Mozyrsky1
1Theoretical Division , Los Alamos National Laboratory , Los Alamos , NM , USA . Email: alwhite@lanl.gov ; Email: serg@lanl.gov ;
Abstract:
Accurate simulation of the non-adiabatic dynamics of molecules in excited electronic states is key to understanding molecular photo-physical processes. Here we present a novel method, based on a semi-classical approximation, that is as efficient as the commonly used mean field Ehrenfest or ad hoc surface hopping methods and properly accounts for interference and decoherence effects. This novel method is an extension of Heller's thawed Gaussian wave-packet dynamics that includes coupling between potential energy surfaces. By studying several standard test problems we demonstrate that the accuracy of the method can be systematically improved while maintaining high efficiency. The method is suitable for investigating the role of quantum coherence in the non-adiabatic dynamics of many-atom molecules.
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