Bendik Støa Sannes
Publications
Fractional charging of electronically open molecules: An explicit projection operator approach
Investigates theoretical descriptions of the fractional charging of a molecular system due to interactions with its environment. The work combines ideas from the theory of open quantum systems with methods in electronic structure theory.
Particle-Breaking Unrestricted Hartree–Fock Theory for Open Molecular Systems
A wave function that considers interactions with an environment resulting in a linear combination of states with different numbers of electrons. It generalizes the restricted model, which is important for a realistic description of fractional charging.
Entanglement coupled cluster theory: Exact spin-adaptation
Presents a new spin-adapted Coupled Cluster framework. Unpaired electrons are entangled with electrons in bath orbitals that do not interact with the molecular system of interest. Desired spin symmetries are obtained with projection operators.
Time-Dependent Particle-Breaking Hartree–Fock Model for Electronically Open Molecules
An extension of the Particle-Breaking Hartree-Fock model to calculate excitation energies and linear response properties for molecules interacting with an environment.
2025
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Sannes, Bendik Støa;
Pedersen, Jacob;
Høyvik, Ida-Marie.
(2025)
Fractional charging of electronically open molecules: An explicit projection operator approach.
Journal of Chemical Physics
Academic article
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Pedersen, Jacob;
Sannes, Bendik Støa;
Paul, Regina;
Coriani, Sonia;
Høyvik, Ida-Marie.
(2025)
Time-Dependent Particle-Breaking Hartree-Fock Model for Electronically Open Molecules.
Journal of Physical Chemistry A
Academic article
2024
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Paul, Regina;
Folkestad, Sarai Dery;
Sannes, Bendik Støa;
Høyvik, Ida-Marie.
(2024)
Particle-Breaking Unrestricted Hartree-Fock Theory for Open Molecular Systems.
Journal of Physical Chemistry A
Academic article
2023
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Sjøholtstrand, Marianne;
Sandnes, Espen;
Vaagland, Henriette;
Sannes, Bendik Støa.
(2023)
Researchers' Night – Ungdommens forskernatt 2023.
Researchers' Night – Ungdommens forskernatt 2023
Other presentation
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Folkestad, Sarai Dery;
Sannes, Bendik Støa;
Koch, Henrik.
(2023)
Entanglement coupled cluster theory: Exact spin-adaptation.
Journal of Chemical Physics
Academic article
Journal publications
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Sannes, Bendik Støa;
Pedersen, Jacob;
Høyvik, Ida-Marie.
(2025)
Fractional charging of electronically open molecules: An explicit projection operator approach.
Journal of Chemical Physics
Academic article
-
Pedersen, Jacob;
Sannes, Bendik Støa;
Paul, Regina;
Coriani, Sonia;
Høyvik, Ida-Marie.
(2025)
Time-Dependent Particle-Breaking Hartree-Fock Model for Electronically Open Molecules.
Journal of Physical Chemistry A
Academic article
-
Paul, Regina;
Folkestad, Sarai Dery;
Sannes, Bendik Støa;
Høyvik, Ida-Marie.
(2024)
Particle-Breaking Unrestricted Hartree-Fock Theory for Open Molecular Systems.
Journal of Physical Chemistry A
Academic article
-
Folkestad, Sarai Dery;
Sannes, Bendik Støa;
Koch, Henrik.
(2023)
Entanglement coupled cluster theory: Exact spin-adaptation.
Journal of Chemical Physics
Academic article
UTSTILLING
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Sjøholtstrand, Marianne;
Sandnes, Espen;
Vaagland, Henriette;
Sannes, Bendik Støa.
(2023)
Researchers' Night – Ungdommens forskernatt 2023.
Researchers' Night – Ungdommens forskernatt 2023
Other presentation
Outreach
2025
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PosterSannes, Bendik Støa; Olsen, Jogvan Magnus Haugaard; Høyvik, Ida-Marie. (2025) Electron transfer across the QM/MM border: Combining PBHF and fluctuating charges. World Association of Theoretical and Computational Chemists WATOC 2025 , Oslo 2025-06-22 - 2025-06-27
2024
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Academic lectureSannes, Bendik Støa; Pedersen, Jacob; Høyvik, Ida-Marie. (2024) Redfield theory for electronically open molecular systems. SCQC Scandinavian Community for Quantum Chemistry , Odense 2024-08-12 - 2024-08-14
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PosterSannes, Bendik Støa; Pedersen, Jacob; Høyvik, Ida-Marie. (2024) Describing molecules as electronically open quantum systems. ESQC European Summerschool in Quantum Chemistry , Palermo 2024-09-08 - 2024-09-21
2023
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PosterSannes, Bendik Støa; Paul, Regina; Høyvik, Ida-Marie. (2023) Electronic structure theory for open molecular systems. The Hylleraas Center and the Theory and Modelling chapter of the Norwegian Chemical Society TRAINS conference , Sundvollen 2023-11-27 - 2023-11-30
2022
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Academic lectureFolkestad, Sarai Dery; Sannes, Bendik Støa; Koch, Henrik. (2022) Entanglement coupled cluster theory - Spin-adapted description of doublet systems within a closed-shell coupled cluster framework. American Chemical Society ACS Fall , Chicago 2022-08-21 - 2022-08-25