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Trygve Helgaker

Active 1984–2022

58
Papers
23,297
Citations
51
h-index
56
i10-index

Citations

Citations per year for Trygve Helgaker1987: 1 citations1988: 3 citations1989: 5 citations1990: 11 citations1991: 7 citations1992: 8 citations1993: 19 citations1994: 17 citations1995: 29 citations1996: 12 citations1997: 9 citations1998: 28 citations1999: 34 citations2000: 52 citations2001: 67 citations2002: 55 citations2003: 62 citations2004: 67 citations2005: 87 citations2006: 97 citations2007: 105 citations2008: 89 citations2009: 100 citations2010: 90 citations2011: 147 citations2012: 117 citations2013: 102 citations2014: 88 citations2015: 100 citations2016: 88 citations2017: 90 citations2018: 75 citations2019: 140 citations2020: 172 citations2021: 139 citations2022: 128 citations2023: 97 citations2024: 196 citations2025: 89 citations2026: 4 citations

Citation sources

Countries

World map of the countries and regions citing this authorUnited States: 672 citing papers, 21.7% of this breakdownGermany: 373 citing papers, 12% of this breakdownUnited Kingdom: 153 citing papers, 4.9% of this breakdownItaly: 139 citing papers, 4.5% of this breakdownDenmark: 138 citing papers, 4.5% of this breakdownChina: 134 citing papers, 4.3% of this breakdownFrance: 124 citing papers, 4% of this breakdownNorway: 96 citing papers, 3.1% of this breakdownCzechia: 94 citing papers, 3% of this breakdownJapan: 93 citing papers, 3% of this breakdownSpain: 84 citing papers, 2.7% of this breakdownCanada: 83 citing papers, 2.7% of this breakdown
0%21.7%Other 29.6%

Institutions

Fields

  • Physics and Astronomy37.2%
  • Chemistry23%
  • Computer Science13.2%
  • Materials Science9.3%
  • Biochemistry, Genetics and Molecular Biology8.3%
  • Engineering2.6%
  • Other6.4%

Topics

  • Advanced Chemical Physics Studies14.3%
  • Spectroscopy and Quantum Chemical Studies9%
  • Molecular spectroscopy and chirality3.9%
  • Machine Learning in Materials Science3.6%
  • Photochemistry and Electron Transfer Studies3.5%
  • Quantum Computing Algorithms and Architecture3.3%
  • Other62.4%

Coauthors

All papers

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  1. Molecular Electronic‐Structure Theory

    Authors: Trygve Helgaker, Poul Jørgensen, Jeppe Olsen - 2000 cited by 2,620

  2. The Dalton quantum chemistry program system

    Authors: Kęstutis Aidas, Celestino Angeli, Keld L. Bak, Vebjørn Bakken, Radovan Bast, Linus Boman, Ove Christiansen, Renzo Cimiraglia, Sonia Coriani, Pål Dahle, Erik K. Dalskov, Ulf Ekström, Thomas Enevoldsen, Janus J. Eriksen, Patrick Ettenhuber, Berta Fernández, Lara Ferrighi, Heike Fliegl, Luca Frediani, Kasper Hald, Asger Halkier, Christof Hättig, Hanne Heiberg, Trygve Helgaker, Alf Christian Hennum, Hinne Hettema, Eirik Hjertenæs, Stinne Høst, Ida‐Marie Høyvik, Maria Francesca Iozzi, Branislav Jansı́k, Hans Jørgen Aa. Jensen, Dan Jonsson, Poul Jørgensen, Joanna Kauczor, Sheela Kirpekar, Thomas Kjærgaard, Wim Klopper, Stefan Knecht, Rika Kobayashi, Henrik Koch, Jacob Kongsted, Andreas Krapp, Kasper Kristensen, Andrea Ligabue, Ola B. Lutnæs, Juan I. Melo, Kurt V. Mikkelsen, Rolf H. Myhre, Christian Neiß, Christian B. Nielsen, Patrick Norman, Jeppe Olsen, Jógvan Magnus Haugaard Olsen, Anders Osted, Martin J. Packer, Filip Pawłowski, Thomas Bondo Pedersen, Patricio F. Provasi, Simen Reine, Žilvinas Rinkevičius, Torgeir A. Ruden, Kenneth Ruud, Vladimir V. Rybkin, Paweł Sałek, Claire C. M. Samson, Alfredo Sánchez de Merás, Trond Saue, Stephan P. A. Sauer, Bernd Schimmelpfennig, Kristian Sneskov, Arnfinn Hykkerud Steindal, Kristian O. Sylvester‐Hvid, Peter R. Taylor, Andrew M. Teale, Erik I. Tellgren, David P. Tew, Andreas J. Thorvaldsen, Lea Thøgersen, Olav Vahtras, Mark A. Watson, David J. D. Wilson, Marcin Ziółkowski, Hans Ågren - Wiley Interdisciplinary Reviews Computational Molecular Science 2013 cited by 1,493

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

    Authors: Andrew M. Teale, Trygve Helgaker, Andreas Savin, Carlo Adamo, Bálint Aradi, Alexei V. Arbuznikov, Paul W. Ayers, Evert Jan Baerends, Vincenzo Barone, Patrizia Calaminici, Éric Cancès, Emily A. Carter, Pratim Kumar Chattaraj, Henry Chermette, Ilaria Ciofini, T. Daniel Crawford, Frank De Proft, John F. Dobson, Claudia Draxl, Thomas Frauenheim, Emmanuel Fromager, Patricio Fuentealba, Laura Gagliardi, Giulia Galli, Jiali Gao, Paul Geerlings, Nikitas I. Gidopoulos, Peter M. W. Gill, Paola Gori‐Giorgi, Andreas Görling, Tim Gould, Stefan Grimme, O. V. Gritsenko, Hans Jørgen Aa. Jensen, Erin R. Johnson, R. Jones, Martin Kaupp, Andreas M. Köster, Leeor Kronik, Anna I. Krylov, Simen Kvaal, Andre Laestadius, Mel Levy, Mathieu Lewin, Shubin Liu, Pierre‐François Loos, Neepa T. Maitra, Frank Neese, John P. Perdew, Katarzyna Pernal, Pascal Pernot, Piotr Piecuch, Elisa Rebolini, Lucia Reining, Pina Romaniello, Adrienn Ruzsinszky, Dennis R. Salahub, Matthias Scheffler, Peter Schwerdtfeger, Viktor N. Staroverov, Jianwei Sun, Erik I. Tellgren, David J. Tozer, S. B. Trickey, Carsten A. Ullrich, Alberto Vela, Giovanni Vignale, Tomasz A. Wesołowski, Xin Xu, Weitao Yang - Physical Chemistry Chemical Physics 2022 cited by 264

  4. Recent Advances in Wave Function-Based Methods of Molecular-Property Calculations

    Authors: Trygve Helgaker, Sonia Coriani, Poul Jørgensen, Kasper Kristensen, Jeppe Olsen, Kenneth Ruud - Chemical Reviews 2012 cited by 727

  5. Basis-set convergence of correlated calculations on water

    Authors: Trygve Helgaker, Wim Klopper, Henrik Koch, Jozef Noga - The Journal of Chemical Physics 1997 cited by 2,578

  6. Excitation energies in density functional theory: An evaluation and a diagnostic test

    Authors: M J Peach, Peter Benfield, Trygve Helgaker, David J. Tozer - The Journal of Chemical Physics 2008 cited by 1,423

  7. Basis-set convergence in correlated calculations on Ne, N2, and H2O

    Authors: Asger Halkier, Trygve Helgaker, Poul Jørgensen, Wim Klopper, Henrik Koch, Jeppe Olsen, Angela K. Wilson - Chemical Physics Letters 1998 cited by 2,199

  8. Basis-set convergence of the energy in molecular Hartree–Fock calculations

    Authors: Asger Halkier, Trygve Helgaker, Poul Jørgensen, Wim Klopper, Jeppe Olsen - Chemical Physics Letters 1999 cited by 703

  9. Ab Initio Methods for the Calculation of NMR Shielding and Indirect Spin−Spin Coupling Constants

    Authors: Trygve Helgaker, Michał Jaszuński, Kenneth Ruud - Chemical Reviews 1998 cited by 1,412

  10. The CC3 model: An iterative coupled cluster approach including connected triples

    Authors: Henrik Koch, Ove Christiansen, Poul Jo rgensen, Alfredo M. Sanchez de Merás, Trygve Helgaker - The Journal of Chemical Physics 1997 cited by 520

  11. The prediction of molecular equilibrium structures by the standard electronic wave functions

    Authors: Trygve Helgaker, Jürgen Gauß, Poul Jo rgensen, Jeppe Olsen - The Journal of Chemical Physics 1997 cited by 346

  12. Quantitative quantum chemistry

    Authors: Trygve Helgaker, Wim Klopper, David P. Tew - Molecular Physics 2008 cited by 260

  13. Dalton Project: A Python platform for molecular- and electronic-structure simulations of complex systems

    Authors: Jógvan Magnus Haugaard Olsen, Simen Reine, Olav Vahtras, Erik Rosendahl Kjellgren, Peter Reinholdt, Karen Oda Hjorth Minde Dundas, Xin Li, Janusz Cukras, Magnus Ringholm, Erik D. Hedegård, Roberto Di Remigio, Nanna Holmgaard List, Rasmus Faber, Bruno Nunes Cabral Tenorio, Radovan Bast, Thomas Bondo Pedersen, Žilvinas Rinkevičius, Stephan P. A. Sauer, Kurt V. Mikkelsen, Jacob Kongsted, Sonia Coriani, Kenneth Ruud, Trygve Helgaker, Hans Jørgen Aa. Jensen, Patrick Norman - The Journal of Chemical Physics 2020 cited by 86

  14. Analytical calculation of nuclear magnetic resonance indirect spin–spin coupling constants at the generalized gradient approximation and hybrid levels of density-functional theory

    Authors: Trygve Helgaker, Mark A. Watson, Nicholas C. Handy - The Journal of Chemical Physics 2000 cited by 371

  15. Density-functional theory of linear and nonlinear time-dependent molecular properties

    Authors: Paweł Sałek, Olav Vahtras, Trygve Helgaker, Hans Ågren - The Journal of Chemical Physics 2002 cited by 393

  16. Optical rotation studied by density-functional and coupled-cluster methods

    Authors: Kenneth Ruud, Trygve Helgaker - Chemical Physics Letters 2002 cited by 216

  17. Analytical Calculation of Geometrical Derivatives in Molecular Electronic Structure Theory

    Authors: Trygve Helgaker, Poul Jørgensen - Advances in quantum chemistry 1988 cited by 201

  18. Basis set convergence of the interaction energy of hydrogen-bonded complexes

    Authors: Asger Halkier, Wim Klopper, Trygve Helgaker, Poul Jo rgensen, Peter R. Taylor - The Journal of Chemical Physics 1999 cited by 389

  19. The quantum-chemical calculation of NMR indirect spin–spin coupling constants

    Authors: Trygve Helgaker, Michał Jaszuński, Magdalena Pecul - Progress in Nuclear Magnetic Resonance Spectroscopy 2008 cited by 293

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

    Authors: Kenneth Ruud, Trygve Helgaker, Rika Kobayashi, Poul Jo rgensen, Keld L. Bak, Hans Jørgen Aa. Jensen - The Journal of Chemical Physics 1994 cited by 239

  21. Accuracy of atomization energies and reaction enthalpies in standard and extrapolated electronic wave function/basis set calculations

    Authors: Keld L. Bak, Poul Jørgensen, Jeppe Olsen, Trygve Helgaker, Wim Klopper - The Journal of Chemical Physics 2000 cited by 234

  22. A priori calculation of molecular properties to chemical accuracy

    Authors: Trygve Helgaker, Torgeir A. Ruden, Poul Jørgensen, Jeppe Olsen, Wim Klopper - Journal of Physical Organic Chemistry 2004 cited by 232

  23. Hartree–Fock limit magnetizabilities from London orbitals

    Authors: Kenneth Ruud, Trygve Helgaker, Keld L. Bak, Poul Jo rgensen, Hans Jørgen Aa. Jensen - The Journal of Chemical Physics 1993 cited by 228

  24. Perturbation-dependent atomic orbitals for the calculation of spin-rotation constants and rotational g tensors

    Authors: Jürgen Gauß, Kenneth Ruud, Trygve Helgaker - The Journal of Chemical Physics 1996 cited by 224