Eirik Fadum Kjønstad

All papers authored by Eirik Fadum Kjønstad

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2023 David M. G. Williams

, Eirik F. Kjønstad

, Todd J. Martínez

Geometric phase in coupled cluster theory

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Eirik F. Kjønstad

, Henrik Koch

Communication: Non-adiabatic derivative coupling elements for the coupled cluster singles and doubles model

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2022 Anna Kristina Schnack-Petersen

, Henrik Koch

, Sonia Coriani

, Eirik F. Kjønstad

Efficient implementation of molecular CCSD gradients with Cholesky-decomposed electron repulsion integrals

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This paper is made freely available by the publisher.

2021 Linda Goletto, Eirik F. Kjønstad

, Sarai D. Folkestad

, Ida-Marie Høyvik

, Henrik Koch

Linear-Scaling Implementation of Multilevel Hartree–Fock Theory

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Sahil Gulania

, Eirik F. Kjønstad

, John F. Stanton

, Henrik Koch

, Anna I. Krylov

Equation-of-motion coupled-cluster method with double electron-attaching operators: Theory, implementation, and benchmarks

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Sarai Dery Folkestad

, Eirik F. Kjønstad

, Linda Goletto, Henrik Koch

Multilevel CC2 and CCSD in Reduced Orbital Spaces: Electronic Excitations in Large Molecular Systems

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2020 Eirik F. Kjønstad

, Henrik Koch

Biorthonormal Formalism for Nonadiabatic Coupled Cluster Dynamics

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Enrico Ronca

, Eirik F. Kjønstad

, Tor Strømsem Haugland

, Angel Rubio

, Henrik Koch

Coupled Cluster Theory for Molecular Polaritons: Changing Ground and Excited States

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Eirik F. Kjønstad

, Sarai D. Folkestad

, Henrik Koch

Accelerated multimodel Newton-type algorithms for faster convergence of ground and excited state coupled cluster equations

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Sarai D. Folkestad

, Eirik F. Kjønstad

, Rolf H. Myhre

, Josefine H. Andersen

, Alice Balbi

, Sonia Coriani

, Tommaso Giovannini

, Linda Goletto

, Tor S. Haugland

, Anders Hutcheson

, Ida-Marie Høyvik

, Torsha Moitra

, Alexander C. Paul

, Marco Scavino

, Andreas S. Skeidsvoll

and 2 other authors

e T 1.0: An open source electronic structure program with emphasis on coupled cluster and multilevel methods

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2019 Rasmus Faber

, Eirik F. Kjønstad

, Henrik Koch

, Sonia Coriani

Spin adapted implementation of EOM-CCSD for triplet excited states: Probing intersystem crossings of acetylacetone at the carbon and oxygen K-edges

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Eirik F. Kjønstad

, Henrik Koch

An Orbital Invariant Similarity Constrained Coupled Cluster Model

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Sarai D. Folkestad

, Eirik F. Kjønstad

, Henrik Koch

An efficient algorithm for Cholesky decomposition of electron repulsion integrals

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2017 Eirik F. Kjønstad

, Rolf H. Myhre

, Todd J. Martínez

, Henrik Koch

Crossing conditions in coupled cluster theory

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Eirik F. Kjønstad

, Henrik Koch

Resolving the Notorious Case of Conical Intersections for Coupled Cluster Dynamics

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2016 Eirik F. Kjønstad

, John F. Moxnes, Tomas L. Jensen, Erik Unneberg

A critical investigation of proposed electrostatic corrections to quantum mechanical volumes: the importance of variation and the irrelevance of imbalance

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Eirik F. Kjønstad

, John F. Moxnes, Tomas L. Jensen, Erik Unneberg

All molecular surfaces are equal: demanding invariance of predictions in linear single-variable models

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Tomas Jensen, John Moxnes, Eirik Kjønstad

, Erik Unneberg

A Study of the Detonation Properties, Propellant Impulses, Impact Sensitivities and Synthesis of Nitrated ANTA and NTO Derivatives

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All papers authored by Eirik Fadum Kjønstad