Improved accuracy on noisy devices by nonunitary variational quantum eigensolver for chemistry applications

F Benfenati, G Mazzola, C Capecci… - Journal of Chemical …, 2021 - ACS Publications
We propose a modification of the Variational Quantum Eigensolver algorithm for electronic
structure optimization using quantum computers, named nonunitary Variational Quantum …

[HTML][HTML] TurboRVB: A many-body toolkit for ab initio electronic simulations by quantum Monte Carlo

K Nakano, C Attaccalite, M Barborini… - The Journal of …, 2020 - pubs.aip.org
TurboRVB is a computational package for ab initio Quantum Monte Carlo (QMC) simulations
of both molecular and bulk electronic systems. The code implements two types of well …

Full correlation in a multiconfigurational study of bimetallic clusters: Restricted active space pair-density functional theory study of [2Fe–2S] systems

D Presti, SJ Stoneburner, DG Truhlar… - The Journal of Physical …, 2019 - ACS Publications
Iron–sulfur clusters play a variety of important roles in protein chemistry, and understanding
the energetics of their spin ladders is an important part of understanding these roles …

[HTML][HTML] Gaussian process based optimization of molecular geometries using statistically sampled energy surfaces from quantum Monte Carlo

R Archibald, JT Krogel, PRC Kent - The Journal of chemical physics, 2018 - pubs.aip.org
Optimization of atomic coordinates and lattice parameters remains a significant challenge to
the wide use of stochastic electronic structure methods such as quantum Monte Carlo …

Effects of static correlation between spin centers in multicenter transition metal complexes

S Chu, D Bovi, F Cappelluti, AG Orellana… - Journal of Chemical …, 2017 - ACS Publications
Multicenter transition metal complexes are the key moieties of many processes in chemistry,
biochemistry, and materials science such as in the active sites of enzymes, molecular …

[HTML][HTML] Theoretical reflections on the structural polymorphism of the oxygen-evolving complex in the S2 state and the correlations to substrate water exchange and …

Y Guo, H Li, LL He, DX Zhao, LD Gong… - Biochimica et Biophysica …, 2017 - Elsevier
The structural polymorphism of the oxygen-evolving complex is of great significance to
photosynthetic water oxidation. Employing density functional theory calculations, we have …

Quantum chemical approaches to [NiFe] hydrogenase

V Vaissier, T Van Voorhis - Essays in Biochemistry, 2017 - portlandpress.com
The mechanism by which [NiFe] hydrogenase catalyses the oxidation of molecular hydrogen
is a significant yet challenging topic in bioinorganic chemistry. With far-reaching applications …

Active Space Methods in Electronic Structure Theory and Applications to Gas Separations in Metal-Organic Frameworks

SJ Stoneburner - 2019 - search.proquest.com
Active space methods such as complete active space self-consistent field theory (CASSCF)
are applied to many systems of interest with a focus on the challenges in choosing orbitals …

Full Correlation in a Multiconfigurational Study of Bimetallic Clusters: Restricted Active Space Pair-Density Functional Theory Study of [2Fe-2S] Systems

SJ Stoneburner, D Presti, DG Truhlar, L Gagliardi - 2019 - mosaic.messiah.edu
Iron-sulfur clusters play a variety of important roles in protein chemistry, and understanding
the energetics of their spin ladders is an important part of understanding these roles …