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 …

Molpro: a general‐purpose quantum chemistry program package

HJ Werner, PJ Knowles, G Knizia… - Wiley …, 2012 - Wiley Online Library
Abstract Molpro (available at http://www. molpro. net) is a general‐purpose quantum
chemical program. The original focus was on high‐accuracy wave function calculations for …

The Molpro quantum chemistry package

HJ Werner, PJ Knowles, FR Manby, JA Black… - The Journal of …, 2020 - pubs.aip.org
Molpro is a general purpose quantum chemistry software package with a long development
history. It was originally focused on accurate wavefunction calculations for small molecules …

Semistochastic heat-bath configuration interaction method: Selected configuration interaction with semistochastic perturbation theory

S Sharma, AA Holmes, G Jeanmairet… - Journal of chemical …, 2017 - ACS Publications
We extend the recently proposed heat-bath configuration interaction (HCI) method [Holmes,
Tubman, Umrigar, J. Chem. Theory Comput. 2016, 12, 3674], by introducing a …

Single-photon emitters in hexagonal boron nitride: a review of progress

A Sajid, MJ Ford, JR Reimers - Reports on Progress in Physics, 2020 - iopscience.iop.org
This report summarizes progress made in understanding properties such as zero-phonon-
line energies, emission and absorption polarizations, electron–phonon couplings, strain …

Magnetic interactions in molecules and highly correlated materials: physical content, analytical derivation, and rigorous extraction of magnetic Hamiltonians

JP Malrieu, R Caballol, CJ Calzado, C De Graaf… - Chemical …, 2014 - ACS Publications
Magnetism is a phenomenon that has always captured the imagination of humans. Its
discovery in the western world is attributed to the ancient Greek civilization. More than 2500 …

[HTML][HTML] Communication: Extended multi-state complete active space second-order perturbation theory: Energy and nuclear gradients

T Shiozaki, W Győrffy, P Celani… - The Journal of Chemical …, 2011 - pubs.aip.org
The extended multireference quasi-degenerate perturbation theory, proposed by Granovsky
[J. Chem. Phys. 134, 214113 (2011)], is combined with internally contracted multi-state …

Defect states in hexagonal boron nitride: Assignments of observed properties and prediction of properties relevant to quantum computation

A Sajid, JR Reimers, MJ Ford - Physical Review B, 2018 - APS
Key properties of nine possible defect sites in hexagonal boron nitride (h-BN), VN, VN− 1,
CN, VNO 2 B, VNNB, VNCB, VBCN, VBCNS i N, and VNCBS i B, are predicted using density …

[HTML][HTML] Perspective: Multireference coupled cluster theories of dynamical electron correlation

FA Evangelista - The Journal of Chemical Physics, 2018 - pubs.aip.org
Predicting the electronic structure and properties of molecular systems that display strong
electron correlation effects continues to remain a fundamental theoretical challenge. This …

Multireference character for 3d transition-metal-containing molecules

W Jiang, NJ DeYonker, AK Wilson - Journal of chemical theory …, 2012 - ACS Publications
Coupled cluster and configuration interaction diagnostics have been examined in order to
assess the reliability of single reference quantum methods for a series of 3d transition metal …