psi
psi

Kenneth Ruud

Ruud

Born September 16, 1969, in Fredrikstad, Norway.

Professor of Chemistry, Department of Chemistry, University of Tromsø – The Arctic University of Norway, Norway; and Director General, Norwegian Defence Research Establishment, Norway

Email:kenneth.ruud@uit.no
WWW: external link

Member of The Royal Norwegian Society of Sciences and Letters (2024), Fellow of the American Association for the Advancement of Science (2019), Board of Directors of the ISTCP (2019), Member of the Norwegian Academy of Technological Sciences (2016), Member of the Finnish Academy of Science and Letters (2014), Member and former vice-president (2020-2022) of the Norwegian Academy for Science and Letters (2012), Dirac Medal of WATOC (2008), Research Prize for Young Researchers from the University of Tromsø (2005), A/S Norsk Varekrigsforsikrings Fonds prize award (1996)

Author of:

Author of more than 330 scientific publications, “Principles and Practices of Molecular Properties: Theory, Modeling, and Simulations”, with Patrick Norman and Trond Saue. Co-author of several quantum chemistry programs: Dalton, Dirac, ReSpect, and OpenRSP.

Important Contributions:

  • Development and application of electronic-structure methods for the calculation of a large and diverse set of molecular properties in a wide frequency range; He has been particularly involved in the use of London atomic orbitals for the calculation of origin-independent magnetic properties such as nuclear magnetic shielding constants; magnetizabilities; optical rotation; vibrational Raman optical activity; electronic, vibrational, rotational and magnetic circular dichroism; spin-rotation and rotational g tensors; and nonlinear birefringences such as the Cotton-Mouton, Jones and Buckingham birefringences; Contributed to the development of an open-ended density matrix-based quasienergy formulation of density-functional response theory using perturbation- and time-dependent basis sets, allowing frequency-dependent molecular properties of arbitrary order to be calculated, including vibrational and magnetic-field perturbations; He has made contributions to the understanding of various nonlinear optical properties, and in particular two- and multiphoton absorption; Contributed to the development of methods for describing both continuum and polarizable embedding environments molecular properties; Contributed to the development of computational methods and the study of relativistic effects on molecular properties using perturbative methods as well as four- and two-component relativistic methods; Contributed to the development of an all-electron, relativistic, four-component density functional theory with perodic boundary conditions using Gaussian atomic orbitals, allowing for a uniform treatment of relativistic effects using Gaussian basis functions from molecules to solids;