Nonadiabatic Dynamics with Coupled Trajectories

Area of Science:

• Quantum Chemistry
• Computational Chemistry
• Molecular Dynamics

Background:

• Simulating excited-state processes requires accurate modeling of quantum effects.
• Decoherence, coherence revival, and nonadiabatic interferences are crucial for long-time dynamics.
• Existing independent-trajectory schemes may not fully capture these complex phenomena.

Purpose of the Study:

• To introduce novel coupled-trajectory schemes for molecular dynamics simulations.
• To enhance the capture of decoherence, coherence revival, and nonadiabatic interferences.
• To compare the performance of new schemes against independent-trajectory methods.

Main Methods:

• Utilizing the exact factorization of the electron-nuclear wave function.
• Incorporating concepts from various surface-hopping schemes.
• Developing and testing new coupled-trajectory algorithms.

Main Results:

• The proposed coupled-trajectory schemes effectively capture decoherence effects and nonadiabatic interferences.
• These new methods demonstrate improved accuracy in simulating long-time molecular dynamics.
• Performance was validated against the exact solution of the time-dependent Schrödinger equation.

Conclusions:

• Coupled-trajectory schemes offer a more robust framework for excited-state dynamics.
• The developed algorithms provide a reliable tool for studying quantum phenomena in molecular systems.
• This work advances the accuracy and scope of molecular dynamics simulations.