Multireference approaches for excited states of molecules

H Lischka, D Nachtigallova, AJA Aquino… - Chemical …, 2018 - ACS Publications
Understanding the properties of electronically excited states is a challenging task that
becomes increasingly important for numerous applications in chemistry, molecular physics …

High resolution infrared spectroscopy in support of ozone atmospheric monitoring and validation of the potential energy function

A Barbe, S Mikhailenko, E Starikova, V Tyuterev - Molecules, 2022 - mdpi.com
The first part of this review is a brief reminder of general information concerning atmospheric
ozone, particularly related to its formation, destruction, observations of its decrease in the …

Bayesian machine learning approach to the quantification of uncertainties on ab initio potential energy surfaces

S Venturi, RL Jaffe, M Panesi - The Journal of Physical Chemistry …, 2020 - ACS Publications
This work introduces a novel methodology for the quantification of uncertainties associated
with potential energy surfaces (PESs) computed from first-principles quantum mechanical …

[HTML][HTML] Potential energy surfaces for O+ O2 collisions

Z Varga, Y Paukku, DG Truhlar - The Journal of chemical physics, 2017 - pubs.aip.org
We present global potential energy surfaces for nine adiabatic electronic states of O 3,
namely, 1 1 A′, 2 1 A′, 1 1 A ″, 1 3 A′, 2 3 A′, 1 3 A ″, 1 5 A′, 2 5 A′, and 1 5 A …

From ab Initio Potential Energy Surfaces to State-Resolved Reactivities: X + H2O ↔ HX + OH [X = F, Cl, and O(3P)] Reactions

J Li, B Jiang, H Song, J Ma, B Zhao… - The Journal of …, 2015 - ACS Publications
We survey the recent advances in theoretical understanding of quantum state resolved
dynamics, using the title reactions as examples. It is shown that the progress was made …

[HTML][HTML] The generality of the GUGA MRCI approach in COLUMBUS for treating complex quantum chemistry

H Lischka, R Shepard, T Müller, PG Szalay… - The Journal of …, 2020 - pubs.aip.org
The core part of the program system COLUMBUS allows highly efficient calculations using
variational multireference (MR) methods in the framework of configuration interaction with …

Kinetic isotope effect of the 16O+ 36O2 and 18O+ 32O2 isotope exchange reactions: Dominant role of reactive resonances revealed by an accurate time-dependent …

Z Sun, D Yu, W **e, J Hou, R Dawes… - The Journal of Chemical …, 2015 - pubs.aip.org
The O+ O 2 isotope exchange reactions play an important role in determining the oxygen
isotopic composition of a number of trace gases in the atmosphere, and their temperature …

AUTOSURF: A freely available program to construct potential energy surfaces

E Quintas-Sánchez, R Dawes - Journal of chemical information …, 2018 - ACS Publications
The potential energy surface (PES) of a molecular system constitutes a cornerstone for
nearly every theoretical study of spectroscopy and dynamics. We present here AUTOSURF …

Localized and delocalized bound states of the main isotopologue 48 O 3 and of 18 O-enriched 50 O 3 isotopomers of the ozone molecule near the dissociation …

V Kokoouline, D Lapierre, A Alijah… - Physical Chemistry …, 2020 - pubs.rsc.org
Knowledge of highly excited rovibrational states of ozone isotopologues is of key importance
for modelling the dynamics of exchange reactions, for understanding longstanding problems …

Classical and quantum trial wave functions in auxiliary-field quantum Monte Carlo applied to oxygen allotropes and a CuBr2 model system

M Amsler, P Deglmann, M Degroote… - The Journal of …, 2023 - pubs.aip.org
In this work, we test a recently developed method to enhance classical auxiliary-field
quantum Monte Carlo (AFQMC) calculations with quantum computers against examples …