Trygve Helgaker

Atomic and Molecular Physics, and Optics · 2000–2013

A researcher in the Science corpus: 12 papers; trusts 2 researchers and is trusted by 0 researchers here, as inferred from the citation graph.

Subfields

• Atomic and Molecular Physics, and Optics — 53 citations into it
• Computational Chemistry & Drug Discovery — 9 citations into it

Whom Trygve Helgaker trusts overall

Their strongest outbound trust, strongest first, inferred from their citations.

1. Axel D. Becke
2. Mark A. Ratner
3. Anna I. Krylov

Who trusts Trygve Helgaker overall

1. Frank Jensen
2. Stefan Grimme
3. Michal Tomza
4. John M. Herbert
5. Markus Reiher
6. Wim Klopper
7. Anna I. Krylov
8. Rodney Bartlett

Papers from Trygve Helgaker's perspective

Ordered by how strongly the researchers Trygve Helgaker trusts endorse each paper. Same corpus, a different order for every researcher.

1. Stereochemistry of Organic Compounds
2. A general algorithm for calculation of Heisenberg exchange integrals J in multispin systems
3. From density-matrix renormalization group to matrix product states
4. The density-matrix renormalization group in the age of matrix product states
5. Measuring orbital interaction using quantum information theory
6. Molecular Electronic-Structure Theory: Helgaker/Molecular Electronic-Structure Theory
7. Electron Paramagnetic Resonance Of Transition Ions
8. An Introduction to the Conjugate Gradient Method Without the Agonizing Pain
9. NBO 6.0: Natural bond orbital analysis program (Journal of Computational Chemistry)
10. Local treatment of electron excitations in the EOM-CCSD method

Their papers

• Molecular Electronic-Structure Theory: Helgaker/Molecular Electronic-Structure Theory (2000) — 1,614 citations
• The Dalton quantum chemistry program system (2013) — 1,343 citations
• Multi‐electron integrals (2012) — 68 citations
• Recent advances in wave function-based methods of molecular-property calculations. (2012) — 603 citations
• Dalton, a molecular electronic structure program, Release Dalton2011 (2011) — 152 citations
• The quantum-chemical calculation of NMR indirect spin-spin coupling constants (2008) — 233 citations
• Excitation energies in density functional theory: an evaluation and a diagnostic test. (2008) — 1,253 citations
• Dalton, a molecular electronic structure program (2005) — 670 citations
• Gauge-Origin Independent Density-Functional Theory Calculations of Vibrational Raman Optical Activity (2002) — 137 citations
• Optical rotation studied by density-functional and coupled-cluster methods (2002) — 150 citations
• Density-functional theory of linear and nonlinear time-dependent molecular properties (2002) — 345 citations
• Analytical calculation of nuclear magnetic resonance indirect spin–spin coupling constants at the generalized gradient approximation and hybrid levels of density-functional theory (2000) — 285 citations