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Single switch surface hopping for molecular dynamics with transitions.

Clotilde Fermanian Kammerer¹, Caroline Lasser

¹Laboratoire d'Analyse et de Mathématiques Appliquées, UMR 8050, Université Paris Est, 94010 Créteil, France. clotilde.fermanian@univ-paris12.fr

The Journal of Chemical Physics

|April 17, 2008

Summary

This summary is machine-generated.

A new single switch surface hopping algorithm accurately models nonadiabatic transitions at conical intersections. This method demonstrates strong performance for the Jahn-Teller system, offering a robust approach for complex chemical dynamics.

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Area of Science:

Quantum chemistry
Computational physics
Chemical dynamics

Background:

Nonadiabatic transitions are crucial in chemical reactions and molecular dynamics.
Conical intersections of potential energy surfaces present significant challenges for theoretical modeling.
Accurate simulation of these transitions is essential for understanding molecular behavior.

Purpose of the Study:

To propose a novel trajectory surface hopping algorithm for simulating nonadiabatic dynamics.
To develop a method based on rigorous mathematical analysis of propagation through conical intersections.
To address the computational challenges associated with nonadiabatic transitions.

Main Methods:

Development of the single switch surface hopping algorithm.
Mathematical analysis of trajectory propagation at conical intersections.
Numerical experiments on a two-mode Jahn-Teller system.

Main Results:

The proposed algorithm, single switch surface hopping, was introduced.
Numerical experiments validated the asymptotic justification of the method.
The algorithm demonstrated good performance within physically relevant parameter ranges.

Conclusions:

The single switch surface hopping algorithm provides a reliable method for simulating nonadiabatic transitions.
The approach is mathematically rigorous and computationally efficient.
This method advances the accurate modeling of molecular dynamics at conical intersections.