What is he best known for?
The fields of study he is best known for:
- Quantum mechanics
- Electron
- Molecule
Trygve Helgaker mainly investigates Atomic physics, Basis set, Computational chemistry, Wave function and Quantum mechanics.
He has included themes like Ab initio quantum chemistry methods, Atomic orbital, Electronic structure, Coupled cluster and Density functional theory in his Atomic physics study.
His studies in Basis set integrate themes in fields like Basis, Extrapolation and Perturbation theory.
His Computational chemistry research incorporates themes from Hessian matrix, Spin, Molecular physics, Simple and Ab initio.
His research in Wave function intersects with topics in Function, Configuration interaction and Condensed matter physics.
His research in Quantum mechanics is mostly concerned with Hamiltonian.
His most cited work include:
- Basis-set convergence of correlated calculations on water (1653 citations)
- Basis-set convergence in correlated calculations on Ne, N2, and H2O (1553 citations)
- Molecular Electronic-Structure Theory: Helgaker/Molecular Electronic-Structure Theory (1303 citations)
What are the main themes of his work throughout his whole career to date?
Trygve Helgaker spends much of his time researching Atomic physics, Quantum mechanics, Computational chemistry, Wave function and Density functional theory.
His Atomic physics study incorporates themes from Field, Atomic orbital, Ab initio and Molecule, Basis set.
His study in Atomic orbital is interdisciplinary in nature, drawing from both Coupled cluster and Tensor.
His studies examine the connections between Basis set and genetics, as well as such issues in Basis, with regards to Limit.
His biological study deals with issues like Coupling constant, which deal with fields such as Electromagnetic shielding and Nuclear magnetic resonance.
His studies deal with areas such as Electronic correlation, Dipole, Classical mechanics, Configuration interaction and Electronic structure as well as Wave function.
He most often published in these fields:
- Atomic physics (31.91%)
- Quantum mechanics (23.87%)
- Computational chemistry (21.86%)
What were the highlights of his more recent work (between 2013-2021)?
- Density functional theory (23.12%)
- Magnetic field (11.81%)
- Quantum mechanics (23.87%)
In recent papers he was focusing on the following fields of study:
Trygve Helgaker focuses on Density functional theory, Magnetic field, Quantum mechanics, Atomic physics and Molecule.
His Density functional theory research includes themes of Wave function, Regular polygon, Statistical physics, Analytical chemistry and Electron density.
His Magnetic field research integrates issues from Current density, Paramagnetism, Condensed matter physics and Atomic orbital.
His research in Quantum mechanics tackles topics such as Quantum electrodynamics which are related to areas like Perturbation theory.
The Atomic physics study combines topics in areas such as Adiabatic process, Bond length, Excitation and Atoms in molecules.
The concepts of his Molecule study are interwoven with issues in Bound state, Molecular physics, Excited state, Diamagnetism and Hamiltonian.
Between 2013 and 2021, his most popular works were:
- The Dalton quantum chemistry program system (782 citations)
- Analytic cubic and quartic force fields using density-functional theory (30 citations)
- Non-perturbative calculation of molecular magnetic properties within current-density functional theory. (29 citations)
In his most recent research, the most cited papers focused on:
- Quantum mechanics
- Electron
- Molecule
Trygve Helgaker mainly focuses on Density functional theory, Magnetic field, Atomic physics, Quantum mechanics and Molecule.
His Density functional theory research is mostly focused on the topic Basis set.
In his study, which falls under the umbrella issue of Basis set, Hartree–Fock method is strongly linked to Ion.
His biological study spans a wide range of topics, including Bond length, Coulomb, Atoms in molecules, Physical system and Adiabatic process.
In the subject of general Quantum mechanics, his work in Ab initio quantum chemistry methods, Molecular electronic structure, Fock matrix and Complete active space is often linked to Quantum chemistry, thereby combining diverse domains of study.
Trygve Helgaker combines subjects such as Diamagnetism, Chemical physics and Molecular dynamics with his study of Molecule.
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