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Trygve Helgaker

Has grant

Professor

University of Oslo

Norway

Research Interests

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Professors in Norway Professors in Condensed Matter Physics Condensed Matter Physics professors in Norway

About

Trygve Helgaker is a Professor at the University of Oslo, Norway. His research encompasses several areas in electronic structure theory, including classical reaction barriers in density functional theory, non-adiabatic coupling matrix elements in magnetic fields, and variational formulations of molecular properties. He has authored numerous recent articles exploring topics such as molecular dynamics, exchange-only virial relations, and the theoretical analysis of carbon dioxide adsorption to UiO-66.

Recent Grants

Grant: Open

Hylleraas Centre for Quantum Molecular Sciences

Open Date: 2017-10-01

Close Date: 2027-09-01

Grant: Close

Molecules in Extreme Environments

Open Date: 2017-08-01

Close Date: 2018-06-01

Grant: Close

Ab-initio adiabatic-connection curves for density-functional analysis and construction

Open Date: 2011-03-01

Close Date: 2016-02-29

Grant: Close

Molecules in magnetic fields

Open Date: 2010-04-01

Close Date: 2015-03-31

Grant: Close

Centre for Theoretical and Computational Chemistry, CTCC

Open Date: 2007-07-01

Close Date: 2017-06-30

Articles (20)

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2026

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2025

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2023

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2022

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2022

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2022

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2022

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2022

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2022

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2021

Collaborators (16)

Michael Ruggenthaler

Research group leader

Max Planck Institute for the Structure and Dynamics of Matter

GERMANY

Trygve Helgaker

Research Interests

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About

Recent Grants

Articles (20)

Perspective on Moreau–Yosida regularization in density-functional theory

The rocky path of DFT into chemistry—Discussions at a symposium and reflections on a circular journey in honor of Axel Becke 1953–2025

Classical Reaction Barriers in DFT: An Adiabatic-Connection Perspective

Cluster perturbation theory. XI. Excitation-energy series using a variational excitation-energy function

Autobiography of Trygve Helgaker

Exchange-only virial relation from the adiabatic connection

Non-adiabatic coupling matrix elements in a magnetic field: Geometric gauge dependence and Berry phase

A variational reformulation of molecular properties in electronic-structure theory

Propagators for molecular dynamics in a magnetic field

Molecular vibrations in the presence of velocity-dependent forces

Time-dependent nuclear-electronic orbital Hartree–Fock theory in a strong uniform magnetic field

Berry Population Analysis: Atomic Charges from the Berry Curvature in a Magnetic Field

Carbon dioxide adsorption to UiO-66: theoretical analysis of binding energy and NMR properties

Lutosław Wolniewicz (1930–2020)

Magnetic-translational sum rule and approximate models of the molecular Berry curvature

Molecular dynamics of linear molecules in strong magnetic fields

Revealing the exotic structure of molecules in strong magnetic fields

Analytic calculation of the Berry curvature and diagonal Born–Oppenheimer correction for molecular systems in uniform magnetic fields

DFT exchange: sharing perspectives on the workhorse of quantum chemistry and materials science

Ab Initio molecular dynamics with screened Lorentz forces. II. Efficient propagators and rovibrational spectra in strong magnetic fields

Collaborators (16)

Michael Ruggenthaler

Michael Herbst

Tomasz Wesolowski

Jeppe Olsen

Bálint Aradi

Paul W. Ayers

Andre Laestadius

Paola Gori-Giorgi

K. Burke

David J. Tozer

Nicolas Tancogne-Dejean

Peter M. W. Gill

Ansgar Pausch

Stefan Grimme

Andreas Erbs Hillers-Bendtsen

Jacek Karwowski

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