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Trygve Helgaker

university of oslo

87H-index
435Paper Count
3.7WCitation Count
Published Papers 147
Publication Date
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Perspective on Moreau–Yosida regularization in density-functional theory
errElectronic Structure
IF2.4
err2026-04-08
err0
errOAAI
errMarkus Penz; Michael F Herbst; Trygve Helgaker; Andre Laestadius
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Autobiography of Trygve Helgaker
errJOURNAL OF PHYSICAL CHEMISTRY A
IF2.8
err2025-12-18
err0
PREAI
errHelgaker, Trygve
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Cluster perturbation theory. XI. Excitation-energy series using a variational excitation-energy function
errJOURNAL OF CHEMICAL PHYSICS
IF3.1
err2025-01-09
err0
PREAI
errHillers-Bendtsen, Andreas Erbs; Johansen, Magnus Bukhave; von Buchwald, Theo Juncker; Mikkelsen, Kurt V.; Olsen, Jeppe; Jorgensen, Poul; Helgaker, Trygve
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Classical Reaction Barriers in DFT: An Adiabatic-Connection Perspective
errJOURNAL OF CHEMICAL THEORY AND COMPUTATION
IF5.5
err2024-12-23
err0
errOAAI
errWibowo-Teale, Andrew M.; Huynh, Bang C.; Helgaker, Trygve; Tozer, David J.
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Non-adiabatic coupling matrix elements in a magnetic field: Geometric gauge dependence and Berry phase
errJOURNAL OF CHEMICAL PHYSICS
IF3.1
err2024-11-12
err0
PREAI
errCulpitt, Tanner; Tellgren, Erik I.; Peters, Laurens D. M.; Helgaker, Trygve
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A variational reformulation of molecular properties in electronic-structure theory
errSCIENCE ADVANCES
IF12.5
err2024-04-26
err0
errOAAI
errJorgensen, Poul; Olsen, Jeppe; Johansen, Magnus Bukhave; von Buchwald, Theo Juncker; Hillers-Bendtsen, Andreas Erbs; Mikkelsen, Kurt V.; Helgaker, Trygve
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Exchange-only virial relation from the adiabatic connection
errJOURNAL OF CHEMICAL PHYSICS
IF3.1
err2024-02-29
err2
errOAAI
errLaestadius, Andre; Csirik, Mihaly A.; Penz, Markus; Tancogne-Dejean, Nicolas; Ruggenthaler, Michael; Rubio, Angel; Helgaker, Trygve
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Molecular vibrations in the presence of velocity-dependent forces
errJOURNAL OF CHEMICAL PHYSICS
IF3.1
err2023-03-30
err2
errOAAI
errTellgren, Erik I.; Culpitt, Tanner; Peters, Laurens D. M.; Helgaker, Trygve
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Time-dependent nuclear-electronic orbital Hartree-Fock theory in a strong uniform magnetic field
errJOURNAL OF CHEMICAL PHYSICS
IF3.1
err2023-03-17
err4
errOAAI
errCulpitt, Tanner; Peters, Laurens D. M.; Tellgren, Erik I.; Helgaker, Trygve
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Berry Population Analysis: Atomic Charges from the Berry Curvature in a Magnetic Field
errJOURNAL OF CHEMICAL THEORY AND COMPUTATION
IF5.5
err2023-01-27
err3
errOAAI
errPeters, Laurens D. M.; Culpitt, Tanner; Tellgren, Erik I.; Helgaker, Trygve
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Magnetic-translational sum rule and approximate models of the molecular Berry curvature
errJOURNAL OF CHEMICAL PHYSICS
IF3.1
err2022-10-07
err6
errOAAI
errPeters, Laurens D. M.; Culpitt, Tanner; Tellgren, Erik I.; Helgaker, Trygve
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Oxyl Character and Methane Hydroxylation Mechanism in Heterometallic M(O)Co3O4 Cubanes (M = Cr, Mn, Fe, Mo, Tc, Ru, and Rh)
errACS CATALYSIS
IF13.1
err2022-09-27
err4
errOAAI
errSkjelstad, Bastian Bjerkem; Helgaker, Trygve; Maeda, Satoshi; Balcells, David
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Molecular dynamics of linear molecules in strong magnetic fields
errJOURNAL OF CHEMICAL PHYSICS
IF3.1
err2022-08-04
err15
errOAAI
errMonzel, Laurenz; Pausch, Ansgar; Peters, Laurens D. M.; Tellgren, Erik I.; Helgaker, Trygve; Klopper, Wim
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Revealing the exotic structure of molecules in strong magnetic fields
errJOURNAL OF CHEMICAL PHYSICS
IF3.1
err2022-05-25
err13
errOAAI
errPemberton, Miles J.; Irons, Tom J. P.; Helgaker, Trygve; Teale, Andrew M.
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Analytic calculation of the Berry curvature and diagonal Born-Oppenheimer correction for molecular systems in uniform magnetic fields
errJOURNAL OF CHEMICAL PHYSICS
IF3.1
err2022-01-31
err17
errOAAI
errCulpitt, Tanner; Peters, Laurens D. M.; Tellgren, Erik I.; Helgaker, Trygve
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Ab Initio molecular dynamics with screened Lorentz forces. II. Efficient propagators and rovibrational spectra in strong magnetic fields
errJOURNAL OF CHEMICAL PHYSICS
IF3.1
err2021-07-08
err16
errOAAI
errPeters, Laurens D. M.; Culpitt, Tanner; Monzel, Laurenz; Tellgren, Erik I.; Helgaker, Trygve
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Ab initio molecular dynamics with screened Lorentz forces. I. Calculation and atomic charge interpretation of Berry curvature
errJOURNAL OF CHEMICAL PHYSICS
IF3.1
err2021-07-08
err26
errOAAI
errCulpitt, Tanner; Peters, Laurens D. M.; Tellgren, Erik I.; Helgaker, Trygve
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First-Principles Calculation of 1H NMR Chemical Shifts of Complex Metal Polyhydrides: The Essential Inclusion of Relativity and Dynamics
errINORGANIC CHEMISTRY
IF4.7
err2020-11-23
err14
errOAAI
errCastro, Abril C.; Balcells, David; Repisky, Michal; Helgaker, Trygve; Cascella, Michele
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Dalton Project: A Python platform for molecular- and electronic-structure simulations of complex systems
errJOURNAL OF CHEMICAL PHYSICS
IF3.1
err2020-06-05
err53
errOAAI
errOlsen, Jogvan Magnus Haugaard; Reine, Simen; Vahtras, Olav; Kjellgren, Erik; Reinholdt, Peter; Dundas, Karen Oda Hjorth; Li, Xin; Cukras, Janusz; Ringholm, Magnus; Hedegard, Erik D.; Di Remigio, Roberto; List, Nanna H.; Faber, Rasmus; Tenorio, Bruno Nunes Cabral; Bast, Radovan; Pedersen, Thomas Bondo; Rinkevicius, Zilvinas; Sauer, Stephan P. A.; Mikkelsen, Kurt V.; Kongsted, Jacob; Coriani, Sonia; Ruud, Kenneth; Helgaker, Trygve; Jensen, Hans Jorgen Aa.; Norman, Patrick
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Strong correlation in density functional theory: general discussion
errFARADAY DISCUSSIONS
IF3.1
err2020-01-01
err2
errOAAI
errFromager, Emmanuel; Gidopoulos, Nikitas; Gori-Giorgi, Paola; Helgaker, Trygve; Loos, Pierre-Francois; Malcomson, Thomas; Pernal, Katarzyna; Savin, Andreas; Truhlar, Donald G.; Wibowo, Meilani; Yang, Weitao
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Research Directions

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Co-authors
Cooperation Journals
D
Donald G. Truhlar
H-index: 187 · Papers: 1.9K
G
Georg Kresse
H-index: 128 · Papers: 503
Á
Ángel Rubio
H-index: 128 · Papers: 1.3K
H
Hans Ågren
H-index: 102 · Papers: 1.6K
W
Weitao Yang
H-index: 96 · Papers: 562
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