Accurate computation of quantum excited states with neural networks

D Pfau, S Axelrod, H Sutterud, I von Glehn, JS Spencer - Science, 2024 - science.org
We present an algorithm to estimate the excited states of a quantum system by variational
Monte Carlo, which has no free parameters and requires no orthogonalization of the states …

Toward a predictive theory of correlated materials

PRC Kent, G Kotliar - Science, 2018 - science.org
Correlated electron materials display a rich variety of notable properties ranging from
unconventional superconductivity to metal-insulator transitions. These properties are of …

[HTML][HTML] QMCPACK: Advances in the development, efficiency, and application of auxiliary field and real-space variational and diffusion quantum Monte Carlo

PRC Kent, A Annaberdiyev, A Benali… - The Journal of …, 2020 - pubs.aip.org
We review recent advances in the capabilities of the open source ab initio Quantum Monte
Carlo (QMC) package QMCPACK and the workflow tool Nexus used for greater efficiency …

A promising intersection of excited‐state‐specific methods from quantum chemistry and quantum Monte Carlo

L Otis, E Neuscamman - Wiley Interdisciplinary Reviews …, 2023 - Wiley Online Library
We present a discussion of recent progress in excited‐state‐specific quantum chemistry and
quantum Monte Carlo alongside a demonstration of how a combination of methods from …

Excitons in solids from periodic equation-of-motion coupled-cluster theory

X Wang, TC Berkelbach - Journal of Chemical Theory and …, 2020 - ACS Publications
We present an ab initio study of electronically excited states of three-dimensional solids
using Gaussian-based periodic equation-of-motion coupled-cluster theory with single and …

Electronic band gaps from quantum Monte Carlo methods

Y Yang, V Gorelov, C Pierleoni, DM Ceperley… - Physical Review B, 2020 - APS
We develop a method for calculating the fundamental electronic gap of semiconductors and
insulators using grand canonical quantum Monte Carlo simulations. We discuss the origin of …

Benchmarking fundamental gap of Sc2C (OH) 2 MXene by many-body methods

M Dubecký, S Minárik, F Karlický - The Journal of Chemical Physics, 2023 - pubs.aip.org
Sc 2 C (OH) 2 is a prototypical non-magnetic member of MXenes, a promising transition-
metal-based 2D material family, with a direct bandgap. We provide here a benchmark of its …

Natural quantum Monte Carlo computation of excited states

D Pfau, S Axelrod, H Sutterud, I von Glehn… - arXiv preprint arXiv …, 2023 - arxiv.org
We present a variational Monte Carlo algorithm for estimating the lowest excited states of a
quantum system which is a natural generalization of the estimation of ground states. The …

[HTML][HTML] Fundamental gap of fluorographene by many-body GW and fixed-node diffusion Monte Carlo methods

M Dubecký, F Karlický, S Minárik, L Mitas - The Journal of Chemical …, 2020 - pubs.aip.org
Fluorographene (FG) is a promising graphene-derived material with a large bandgap.
Currently existing predictions of its fundamental gap (Δ f) and optical gap (Δ opt) significantly …

Cohesion and excitations of diamond-structure silicon by quantum Monte Carlo: Benchmarks and control of systematic biases

A Annaberdiyev, G Wang, CA Melton, MC Bennett… - Physical Review B, 2021 - APS
We have carried out quantum Monte Carlo (QMC) calculations of silicon crystal focusing on
the accuracy and systematic biases that affect the electronic structure characteristics. The …