Variational quantum approaches for computing vibrational energies of polyatomic molecules

JM Bowman, T Carrington, HD Meyer - Molecular Physics, 2008‏ - Taylor & Francis
In this article, we review state-of-the-art methods for computing vibrational energies of
polyatomic molecules using quantum mechanical, variationally-based approaches. We …

Frequency and zero-point vibrational energy scale factors for double-hybrid density functionals (and other selected methods): can anharmonic force fields be avoided …

MK Kesharwani, B Brauer… - The Journal of Physical …, 2015‏ - ACS Publications
We have obtained uniform frequency scaling factors λharm (for harmonic frequencies), λfund
(for fundamentals), and λZPVE (for zero-point vibrational energies (ZPVEs)) for the Weigend …

Vibrational spectroscopy of the water dimer at jet-cooled and atmospheric temperatures

E Vogt, HG Kjaergaard - Annual Review of Physical Chemistry, 2022‏ - annualreviews.org
The vibrational spectroscopy of the water dimer provides an understanding of basic
hydrogen bonding in water clusters, and with about one water dimer for every 1,000 water …

A multilayer multiconfigurational time-dependent Hartree approach for quantum dynamics on general potential energy surfaces

U Manthe - The Journal of chemical physics, 2008‏ - pubs.aip.org
The multiconfigurational time-dependent Hartree (MCTDH) approach facilitates
multidimensional quantum dynamics calculations by representing the wavepacket in an …

The fourth age of quantum chemistry: molecules in motion

AG Csaszar, C Fabri, T Szidarovszky… - Physical Chemistry …, 2012‏ - pubs.rsc.org
Developments during the last two decades in nuclear motion theory made it possible to
obtain variational solutions to the time-independent, nuclear-motion Schrödinger equation of …

High-order contact transformations of molecular Hamiltonians: general approach, fast computational algorithm and convergence of ro-vibrational polyad models

V Tyuterev, S Tashkun, M Rey, A Nikitin - Molecular Physics, 2022‏ - Taylor & Francis
The paper describes methods and fast computational algorithm for building effective
Hamiltonians in molecular physics using perturbative approach. Separations of fast and …

A nested molecule-independent neural network approach for high-quality potential fits

S Manzhos, X Wang, R Dawes… - The Journal of Physical …, 2006‏ - ACS Publications
It is shown that neural networks (NNs) are efficient and effective tools for fitting potential
energy surfaces. For H2O, a simple NN approach works very well. To fit surfaces for HOOH …

[HTML][HTML] Perspective: Computing (ro-) vibrational spectra of molecules with more than four atoms

T Carrington - The Journal of Chemical Physics, 2017‏ - pubs.aip.org
In this perspective, I review methods for computing (ro-) vibrational energy levels and
wavefunctions of molecules with more than four atoms. I identify three problems one …

Computing excited OH stretch states of water dimer in 12D using contracted intermolecular and intramolecular basis functions

XG Wang, T Carrington - The Journal of Chemical Physics, 2023‏ - pubs.aip.org
Due to the ubiquity and importance of water, water dimer has been intensively studied.
Computing the (ro-) vibrational spectrum of water dimer is challenging. The potential has …

Global analysis of the high resolution infrared spectrum of methane 12CH4 in the region from 0 to 4800 cm− 1

S Albert, S Bauerecker, V Boudon, LR Brown… - Chemical Physics, 2009‏ - Elsevier
We report the global analysis of methane (12CH4) lines from high resolution rovibrational
spectra including accurate line positions and intensities in the region 0–4800cm− 1. This …