Helena Larsen

907 total citations
17 papers, 772 citations indexed

About

Helena Larsen is a scholar working on Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials and Spectroscopy. According to data from OpenAlex, Helena Larsen has authored 17 papers receiving a total of 772 indexed citations (citations by other indexed papers that have themselves been cited), including 16 papers in Atomic and Molecular Physics, and Optics, 6 papers in Electronic, Optical and Magnetic Materials and 5 papers in Spectroscopy. Recurrent topics in Helena Larsen's work include Advanced Chemical Physics Studies (15 papers), Inorganic Fluorides and Related Compounds (4 papers) and Atmospheric Ozone and Climate (4 papers). Helena Larsen is often cited by papers focused on Advanced Chemical Physics Studies (15 papers), Inorganic Fluorides and Related Compounds (4 papers) and Atmospheric Ozone and Climate (4 papers). Helena Larsen collaborates with scholars based in Denmark, Germany and Norway. Helena Larsen's co-authors include Jeppe Olsen, Poul Jørgensen, Poul Jo rgensen, Trygve Helgaker, Christof Hättig, Ove Christiansen, Jürgen Gauß, Asger Halkier, Kasper Hald and Antonio Rizzo and has published in prestigious journals such as The Journal of Chemical Physics and Chemical Physics Letters.

In The Last Decade

Helena Larsen

17 papers receiving 752 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Helena Larsen Denmark 15 645 234 120 118 113 17 772
Debasis Mukhopadhyay India 15 707 1.1× 214 0.9× 121 1.0× 64 0.5× 84 0.7× 34 803
Jan Wasilewski Poland 14 575 0.9× 167 0.7× 100 0.8× 43 0.4× 114 1.0× 34 679
Poul J�rgensen Denmark 8 774 1.2× 329 1.4× 212 1.8× 116 1.0× 122 1.1× 10 913
Ondřej Demel Czechia 19 758 1.2× 207 0.9× 133 1.1× 49 0.4× 128 1.1× 27 881
Sten Rettrup Denmark 16 501 0.8× 232 1.0× 156 1.3× 119 1.0× 164 1.5× 45 782
Leszek Z. Stolarczyk Poland 13 557 0.9× 141 0.6× 103 0.9× 51 0.4× 74 0.7× 27 644
K. R. Shamasundar India 16 719 1.1× 221 0.9× 112 0.9× 56 0.5× 136 1.2× 30 904
Hosung Sun South Korea 17 668 1.0× 185 0.8× 86 0.7× 35 0.3× 76 0.7× 52 725
Haruki Ishikawa Japan 20 543 0.8× 402 1.7× 175 1.5× 174 1.5× 226 2.0× 70 1.0k
K. Somasundram United Kingdom 10 556 0.9× 197 0.8× 105 0.9× 35 0.3× 119 1.1× 11 648

Countries citing papers authored by Helena Larsen

Since Specialization
Citations

This map shows the geographic impact of Helena Larsen's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Helena Larsen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Helena Larsen more than expected).

Fields of papers citing papers by Helena Larsen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Helena Larsen. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Helena Larsen. The network helps show where Helena Larsen may publish in the future.

Co-authorship network of co-authors of Helena Larsen

This figure shows the co-authorship network connecting the top 25 collaborators of Helena Larsen. A scholar is included among the top collaborators of Helena Larsen based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Helena Larsen. Helena Larsen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

17 of 17 papers shown
1.
Larsen, Helena, et al.. (2015). Modal particles indexing common ground in two different registers. 7(2). 315–347. 3 indexed citations
2.
Larsen, Helena, Trygve Helgaker, Jeppe Olsen, & Poul Jørgensen. (2001). Geometrical derivatives and magnetic properties in atomic-orbital density-based Hartree–Fock theory. The Journal of Chemical Physics. 115(22). 10344–10352. 41 indexed citations
3.
Larsen, Helena, Kasper Hald, Jeppe Olsen, & Poul Jørgensen. (2001). Triplet excitation energies in full configuration interaction and coupled-cluster theory. The Journal of Chemical Physics. 115(7). 3015–3020. 75 indexed citations
4.
Larsen, Helena, Jeppe Olsen, Poul Jørgensen, & Trygve Helgaker. (2001). Direct optimization of the atomic-orbital density matrix using the conjugate-gradient method with a multilevel preconditioner. The Journal of Chemical Physics. 115(21). 9685–9697. 40 indexed citations
5.
Larsen, Helena, Jeppe Olsen, Poul Jørgensen, & Jürgen Gauß. (2001). Comparison of full-configuration interaction and coupled-cluster harmonic and fundamental frequencies for BH and HF. Chemical Physics Letters. 342(1-2). 200–206. 15 indexed citations
6.
Larsen, Helena, et al.. (2000). Hartree–Fock and Kohn–Sham atomic-orbital based time-dependent response theory. The Journal of Chemical Physics. 113(20). 8908–8917. 49 indexed citations
7.
Pecul, Magdalena, Michał Jaszuński, Helena Larsen, & Poul Jørgensen. (2000). Singlet excited states of Be2. The Journal of Chemical Physics. 112(8). 3671–3679. 31 indexed citations
8.
Larsen, Helena, Jeppe Olsen, Poul Jørgensen, & Ove Christiansen. (2000). Full configuration interaction benchmarking of coupled-cluster models for the lowest singlet energy surfaces of N2. The Journal of Chemical Physics. 113(16). 6677–6686. 101 indexed citations
9.
Helgaker, Trygve, Helena Larsen, Jeppe Olsen, & Poul Jørgensen. (2000). Direct optimization of the AO density matrix in Hartree–Fock and Kohn–Sham theories. Chemical Physics Letters. 327(5-6). 397–403. 63 indexed citations
10.
Larsen, Helena, Asger Halkier, Jeppe Olsen, & Poul Jørgensen. (2000). On the divergent behavior of Møller–Plesset perturbation theory for the molecular electric dipole moment. The Journal of Chemical Physics. 112(3). 1107–1112. 27 indexed citations
11.
Larsen, Helena, Jeppe Olsen, Christof Hättig, et al.. (1999). Polarizabilities and first hyperpolarizabilities of HF, Ne, and BH from full configuration interaction and coupled cluster calculations. The Journal of Chemical Physics. 111(5). 1917–1925. 84 indexed citations
12.
Halkier, Asger, Helena Larsen, Jeppe Olsen, Poul Jo rgensen, & Jürgen Gauß. (1999). Full configuration interaction benchmark calculations of first-order one-electron properties of BH and HF. The Journal of Chemical Physics. 110(2). 734–740. 78 indexed citations
13.
Koch, Henrik, Christof Hättig, Helena Larsen, et al.. (1999). The effect of intermolecular interactions on the electric properties of helium and argon. II. The dielectric, refractivity, Kerr, and hyperpolarizability second virial coefficients. The Journal of Chemical Physics. 111(22). 10108–10118. 47 indexed citations
14.
Larsen, Helena, Jeppe Olsen, & Christof Hättig. (1999). Dispersion coefficients for polarizabilities and first and second hyperpolarizabilities using full configuration interaction theory. Chemical Physics Letters. 307(3-4). 235–243. 6 indexed citations
15.
Halkier, Asger, Helena Larsen, Jeppe Olsen, & Poul Jo rgensen. (1999). Divergent behavior of Mo/ller–Plesset perturbation theory for molecular electric dipole and quadrupole moments. The Journal of Chemical Physics. 110(15). 7127–7128. 16 indexed citations
16.
Hättig, Christof, Helena Larsen, Jeppe Olsen, et al.. (1999). The effect of intermolecular interactions on the electric properties of helium and argon. I. Ab initio calculation of the interaction induced polarizability and hyperpolarizability in He2 and Ar2. The Journal of Chemical Physics. 111(22). 10099–10107. 73 indexed citations
17.
Larsen, Helena, Christof Hättig, Jeppe Olsen, & Poul Jørgensen. (1998). A basis set study of coupled cluster and full configuration interaction calculations of molecular electric properties for BH. Chemical Physics Letters. 291(5-6). 536–546. 23 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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