World's Best Scientists 2026 revealed!
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Chemistry
Norway
2026

D-Index & Metrics

Chemistry

D-Index
83
Citations
21977
World Ranking
2984
National Ranking
7

Research.com Recognitions

  • 2026 - Research.com Chemistry in Norway Leader Award
  • 2025 - Research.com Chemistry in Norway Leader Award
  • 2022 - Research.com Chemistry in Norway Leader Award
  • 2019 - Fellow of the American Association for the Advancement of Science (AAAS)

Overview

Kenneth Ruud is affiliated with the University of Tromsø - The Arctic University of Norway in Norway. Their research primarily spans the fields of Physics and Astronomy as well as Materials Science. Within these domains, their work focuses on several subfields including Atomic and Molecular Physics, and Optics, Materials Chemistry, Spectroscopy, Electronic, Optical and Magnetic Materials, and Biomedical Engineering.

The scientist's main topics of study include Advanced Chemical Physics Studies, Spectroscopy and Quantum Chemical Studies, Molecular Spectroscopy and Chirality, 2D Materials and Applications, Photochemistry and Electron Transfer Studies, Advanced NMR Techniques and Applications, and Protein Structure and Dynamics.

Recent publications by Kenneth Ruud highlight a range of specialized research activities. Key papers include:

  • "ReSpect: Relativistic spectroscopy DFT program package" (2020) published in The Journal of Chemical Physics
  • "Dalton Project: A Python platform for molecular- and electronic-structure simulations of complex systems" (2020) published in The Journal of Chemical Physics
  • "Choosing Bad versus Worse: Predictions of Two-Photon-Absorption Strengths Based on Popular Density Functional Approximations" (2022) published in Journal of Chemical Theory and Computation
  • "Relativity and the World of Molecules" (2023) published in American Scientist
  • "Accurate X-ray Absorption Spectra near L- and M-Edges from Relativistic Four-Component Damped Response Time-Dependent Density Functional Theory" (2021) published in Inorganic Chemistry

Kenneth Ruud often collaborates with several frequent co-authors, including:

  • Michal Repiský
  • Marius Kadek
  • Pijush Karak
  • Swapan Chakrabarti
  • Marc Joosten

Their research has been published in multiple venues with frequent contributions to:

  • The Journal of Physical Chemistry A
  • arXiv (Cornell University)
  • The Journal of Chemical Physics
  • Physical Chemistry Chemical Physics
  • Zenodo (CERN European Organization for Nuclear Research)

Kenneth Ruud was recognized as a Fellow of the American Association for the Advancement of Science (AAAS) in 2019.

Best Publications

  • Ab Initio Methods for the Calculation of NMR Shielding and Indirect Spin-Spin Coupling Constants

    Trygve Helgaker;Michał Jaszuński;Kenneth Ruud

  • The Dalton quantum chemistry program system

    Kestutis Aidas;Celestino Angeli;Keld L. Bak;Vebjørn Bakken

  • Recent advances in wave function-based methods of molecular-property calculations.

    Trygve Helgaker;Sonia Coriani;Poul Jørgensen;Kasper Kristensen

  • Dalton, a molecular electronic structure program

    H. Agren;David John. Wilson;O. Vahtras;P. R. Taylor

  • Multiconfigurational self-consistent field calculations of nuclear shieldings using London atomic orbitals

    Kenneth Ruud;Trygve Helgaker;Rika Kobayashi;Poul Jo

  • Vibrational Raman optical activity calculations using London atomic orbitals

    Trygve Helgaker;Kenneth Ruud;Keld L. Bak;Poul Jørgensen

  • Arbitrary-Order Density Functional Response Theory from Automatic Differentiation.

    Ulf Ekström;Lucas Visscher;Radovan Bast;Andreas J Thorvaldsen

  • Hartree-Fock limit magnetizabilities from London orbitals

    Kenneth Ruud;Trygve Helgaker;Keld L. Bak;Poul Jo

  • An efficient approach for calculating vibrational wave functions and zero-point vibrational corrections to molecular properties of polyatomic molecules

    Kenneth Ruud;Per-Olof Åstrand;Peter R. Taylor

  • Dalton, a molecular electronic structure program, Release Dalton2011

    C Angeli;K. L. Bak;V. Bakken;O. Christiansen

  • Perturbation‐dependent atomic orbitals for the calculation of spin‐rotation constants and rotational g tensors

    Jürgen Gauss;Kenneth Ruud;Trygve Helgaker

  • Benchmarking two-photon absorption cross sections: performance of CC2 and CAM-B3LYP

    Maarten T. P. Beerepoot;Daniel Henrik Friese;Nanna Holmgaard List;Jacob Kongsted

  • Optical rotation studied by density-functional and coupled-cluster methods

    Kenneth Ruud;Trygve Helgaker

  • Gauge-origin independent multiconfigurational self-consistent-field theory for vibrational circular dichroism

    Keld L. Bak;Poul Jo;rgensen;Trygve Helgaker

  • BASIS-SET DEPENDENCE OF NUCLEAR SPIN-SPIN COUPLING CONSTANTS

    Trygve Helgaker;Michał Jaszuński;Kenneth Ruud;Anna Górska

  • Vibrational corrections to indirect nuclear spin–spin coupling constants calculated by density-functional theory

    Torgeir A. Ruden;Ola B. Lutnæs;Trygve Helgaker;Kenneth Ruud

  • The Ab Initio Calculation of Optical Rotation and Electronic Circular Dichroism

    Magdalena Pecul;Kenneth Ruud

  • TDDFT diagnostic testing and functional assessment for triazene chromophores.

    Michael J. G. Peach;C. Ruth Le Sueur;Kenneth Ruud;Maxime Guillaume

  • Gauge-Origin Independent Density-Functional Theory Calculations of Vibrational Raman Optical Activity

    Kenneth Ruud;Trygve Helgaker;Petr Bour

  • Ab initio calculation of electronic circular dichroism for trans-cyclooctene using London atomic orbitals*

    Keld L. Bak;Aage E. Hansen;Kenneth Ruud;Trygve Helgaker

Frequent Co-Authors

Trygve Helgaker
Trygve Helgaker University of Oslo
Sonia Coriani
Sonia Coriani Technical University of Denmark
Kurt V. Mikkelsen
Kurt V. Mikkelsen University of Copenhagen
Hans Ågren
Hans Ågren Uppsala University
Poul Jørgensen
Poul Jørgensen Aarhus University
Jacob Kongsted
Jacob Kongsted University of Southern Denmark
Peter R. Taylor
Peter R. Taylor Tianjin University
Jeppe Olsen
Jeppe Olsen Aarhus University
Ove Christiansen
Ove Christiansen Aarhus University
Poul Jo
Poul Jo Aarhus University

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