TeraChem: A graphical processing unit‐accelerated electronic structure package for large‐scale ab initio molecular dynamics

S Seritan, C Bannwarth, BS Fales… - Wiley …, 2021 - Wiley Online Library
TeraChem was born in 2008 with the goal of providing fast on‐the‐fly electronic structure
calculations to facilitate ab initio molecular dynamics studies of large biochemical systems …

MultiPsi: A python‐driven MCSCF program for photochemistry and spectroscopy simulations on modern HPC environments

MG Delcey - Wiley Interdisciplinary Reviews: Computational …, 2023 - Wiley Online Library
We present MultiPsi, an open‐source MCSCF program for the calculation of ground and
excited states properties of strongly correlated systems. The program currently implements a …

Enhancing initial state overlap through orbital optimization for faster molecular electronic ground-state energy estimation

PJ Ollitrault, CL Cortes, JF Gonthier, RM Parrish… - Physical Review Letters, 2024 - APS
The phase estimation algorithm is crucial for computing the ground-state energy of a
molecular electronic Hamiltonian on a quantum computer. Its efficiency depends on the …

[HTML][HTML] CAS without SCF—Why to use CASCI and where to get the orbitals

BG Levine, AS Durden, MP Esch, F Liang… - The Journal of Chemical …, 2021 - pubs.aip.org
The complete active space self-consistent field (CASSCF) method has seen broad adoption
due to its ability to describe the electronic structure of both the ground and excited states of …

Hot exciplexes in U-shaped TADF molecules with emission from locally excited states

AL Schleper, K Goushi, C Bannwarth… - Nature …, 2021 - nature.com
Fast emission and high color purity are essential characteristics of modern opto-electronic
devices, such as organic light emitting diodes (OLEDs). These properties are currently not …

Excited states, symmetry breaking, and unphysical solutions in state-specific CASSCF theory

A Marie, HGA Burton - The Journal of Physical Chemistry A, 2023 - ACS Publications
State-specific electronic structure theory provides a route toward balanced excited-state
wave functions by exploiting higher-energy stationary points of the electronic energy …

Efficient computation of two-electron reduced density matrices via selected configuration interaction

JP Coe, A Moreno Carrascosa… - Journal of Chemical …, 2022 - ACS Publications
We create an approach to efficiently calculate two-electron reduced density matrices (2-
RDMs) using selected configuration interaction wavefunctions. This is demonstrated using …

Extending GPU-accelerated Gaussian integrals in the TeraChem software package to f type orbitals: Implementation and applications

Y Wang, D Hait, KG Johnson, OJ Fajen… - The Journal of …, 2024 - pubs.aip.org
The increasing availability of graphics processing units (GPUs) for scientific computing has
prompted interest in accelerating quantum chemical calculations through their use …

Combined unitary and symmetric group approach applied to low-dimensional Heisenberg spin systems

W Dobrautz, VM Katukuri, NA Bogdanov, D Kats… - Physical Review B, 2022 - APS
A novel combined unitary and symmetric group approach is used to study the spin-1 2
Heisenberg model and related Fermionic systems in a total spin-adapted representation …

A configuration‐based heatbath‐CI for spin‐adapted multireference electronic structure calculations with large active spaces

M Ugandi, M Roemelt - Journal of Computational Chemistry, 2023 - Wiley Online Library
This work reports on a spin‐pure configuration‐based implementation of the heatbath
configuration interaction (HCI) algorithm for selective configuration interaction. Besides the …