A direct diabatic states construction method with consistent orbitals for valence and Rydberg states
Year: 2025
Type: article
Abstract: This work presents a novel methodology termed Direct Diabatic States Construction (DDSC), which integrates fragment wavefunctions into an anti-symmetric wavefunction for the entire system. Using fragment-localized state-consistent molecular orbitals, this approach enables direct construction of all diabatic states at the same root. Each diabatic state is formed as a linear combination of a set of diabatic configurations. The validity and effectiveness of DDSC have been demonstrated through its application to the LiH and (C2H4)2+ molecules. The results show that this method is suitable for constructing both valence and Rydberg diabatic states. One of the key advantages of DDSC is its ability to directly compute diabatic couplings, which can be converted to non-adiabatic coupling vectors along the reaction coordinate. The DDSC method efficiently builds the diabatic potential energy matrix, especially for systems with clear fragment partitions and weak inter-fragment interactions, such as charge transfer reactions.
Source: The Journal of Chemical Physics
DOI: 10.1063/5.0280918
Authors: Jiamin Jin, Zexing Qu, Chungen Liu
Institutions: Nanjing University, Jilin University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4413102402