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Title: The DQ and DQΦ electronic structure diabatization methods: Validation for general applications

Abstract

We recently proposed the dipole-quadrupole (DQ) method for transforming adiabatic electronic states to diabatic states by using matrix elements of the dipole and quadrupole operators, and we applied the method to 3-state diabatizations of LiH and phenol. Here in this paper we extend the method to also include the electrostatic potential, and we call the resulting method the DQΦ method, which denotes the dipole–quadrupole–electrostatic-potential diabatization method. The electrostatic potential provides extra flexibility, and the goal of the present work is to test and illustrate the robustness of the methods for producing diabatic potential energy curves that tend to the adiabatic curves away from crossings and avoided crossings and are smooth in regions of crossings and avoided crossings. We illustrate the generality of the methods by an application to LiH with four states and by two-state diabatizations of HCl, (H2)2, O3, and the reaction Li + HF → LiF + H. We find that—if enough states are included—the DQ method does not have a significant dependence on the parameter weighting the quadrupole moment, and a geometryindependent value of 10 a0 -2 is adequate in all cases tested. We also find that the addition of the electrostatic potential improves the diabatic potentialsmore » in some cases and provides an additional property useful for increasing the generality of the method for diabatization.« less

Authors:
ORCiD logo [1];  [1];  [1]; ORCiD logo [1]
  1. Univ. of Minnesota, Minneapolis, MN (United States). Minnesota Supercomputing Inst., and Dept. of Chemistry, Chemical Theory Center
Publication Date:
Research Org.:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1471095
Alternate Identifier(s):
OSTI ID: 1253223
Grant/Contract Number:  
SC0008666
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 144; Journal Issue: 19; Journal ID: ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Hoyer, Chad E., Parker, Kelsey, Gagliardi, Laura, and Truhlar, Donald G. The DQ and DQΦ electronic structure diabatization methods: Validation for general applications. United States: N. p., 2016. Web. doi:10.1063/1.4948728.
Hoyer, Chad E., Parker, Kelsey, Gagliardi, Laura, & Truhlar, Donald G. The DQ and DQΦ electronic structure diabatization methods: Validation for general applications. United States. doi:10.1063/1.4948728.
Hoyer, Chad E., Parker, Kelsey, Gagliardi, Laura, and Truhlar, Donald G. Sat . "The DQ and DQΦ electronic structure diabatization methods: Validation for general applications". United States. doi:10.1063/1.4948728. https://www.osti.gov/servlets/purl/1471095.
@article{osti_1471095,
title = {The DQ and DQΦ electronic structure diabatization methods: Validation for general applications},
author = {Hoyer, Chad E. and Parker, Kelsey and Gagliardi, Laura and Truhlar, Donald G.},
abstractNote = {We recently proposed the dipole-quadrupole (DQ) method for transforming adiabatic electronic states to diabatic states by using matrix elements of the dipole and quadrupole operators, and we applied the method to 3-state diabatizations of LiH and phenol. Here in this paper we extend the method to also include the electrostatic potential, and we call the resulting method the DQΦ method, which denotes the dipole–quadrupole–electrostatic-potential diabatization method. The electrostatic potential provides extra flexibility, and the goal of the present work is to test and illustrate the robustness of the methods for producing diabatic potential energy curves that tend to the adiabatic curves away from crossings and avoided crossings and are smooth in regions of crossings and avoided crossings. We illustrate the generality of the methods by an application to LiH with four states and by two-state diabatizations of HCl, (H2)2, O3, and the reaction Li + HF → LiF + H. We find that—if enough states are included—the DQ method does not have a significant dependence on the parameter weighting the quadrupole moment, and a geometryindependent value of 10 a0 -2 is adequate in all cases tested. We also find that the addition of the electrostatic potential improves the diabatic potentials in some cases and provides an additional property useful for increasing the generality of the method for diabatization.},
doi = {10.1063/1.4948728},
journal = {Journal of Chemical Physics},
number = 19,
volume = 144,
place = {United States},
year = {2016},
month = {5}
}

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    Works referencing / citing this record:

    Representation of coupled adiabatic potential energy surfaces using neural network based quasi-diabatic Hamiltonians: 1,2 2 A′ states of LiFH
    journal, January 2019

    • Guan, Yafu; Zhang, Dong H.; Guo, Hua
    • Physical Chemistry Chemical Physics, Vol. 21, Issue 26
    • DOI: 10.1039/c8cp06598e

    Representation of coupled adiabatic potential energy surfaces using neural network based quasi-diabatic Hamiltonians: 1,2 2 A′ states of LiFH
    journal, January 2019

    • Guan, Yafu; Zhang, Dong H.; Guo, Hua
    • Physical Chemistry Chemical Physics, Vol. 21, Issue 26
    • DOI: 10.1039/c8cp06598e