Browsing Kjemisk institutt by Author "Aurbakken, Einar"
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Ofstad, Benedicte Sverdrup; Kristiansen, Håkon Emil; Aurbakken, Einar; Schøyen, Øyvind Sigmundson; Kvaal, Simen; Pedersen, Thomas Bondo (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)Real-time simulations of laser-driven electron dynamics contain information about molecular optical properties through all orders in response theory. These properties can be extracted by assuming convergence of the power ...
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Kristiansen, Håkon Emil; Ofstad, Benedicte Sverdrup; Hauge, Eirill Strand; Aurbakken, Einar; Schøyen, Øyvind Sigmundson; Kvaal, Simen; Pedersen, Thomas Bondo (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)We present a derivation of real-time (RT) time-dependent orbital-optimized Møller–Plesset (TDOMP2) theory and its biorthogonal companion, time-dependent non-orthogonal OMP2 theory, starting from the time-dependent bivariational ...
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Aurbakken, Einar (Master thesis / Masteroppgave, 2020)
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Ofstad, Benedicte; Wibowo-Teale, Meilani; Kristiansen, Håkon Emil; Aurbakken, Einar; Kitsaras, Marios-Petros; Schøyen, Øyvind Sigmundson; Hauge, Eirill Strand; Irons, Tom J. P.; Kvaal, Simen; Stopkowicz, Stella; Wibowo-Teale, Andrew M.; Pedersen, Thomas Bondo (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2023)We present a numerical approach to magnetic optical rotation based on real-time time-dependent electronic-structure theory. Not relying on perturbation expansions in the magnetic-field strength, the formulation allows us ...
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Hansen, Audun Skau; Aurbakken, Einar; Pedersen, Thomas Bondo (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)Local approximations facilitate the application of post-Hartree–Fock methods in the condensed phase, but simultaneously introduce errors leading to discontinuous potential-energy surfaces. In this work, we explore how these ...
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Ofstad, Benedicte Sverdrup; Aurbakken, Einar; Schøyen, Øyvind Sigmundson; Kristiansen, Håkon Emil; Kvaal, Simen; Pedersen, Thomas Bondo (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2023)Recent years have witnessed an increasing interest in time-dependent coupled-cluster (TDCC) theory for simulating laser-driven electronic dynamics in atoms and molecules, and for simulating molecular vibrational dynamics. ...
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Transient spectroscopy from time-dependent electronic-structure theory without multipole expansions Aurbakken, Einar; Ofstad, Benedicte; Kristiansen, Håkon Emil; Schøyen, Øyvind Sigmundson; Kvaal, Simen; Sørensen, Lasse Kragh; Lindh, Roland; Pedersen, Thomas Bondo (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2023)Based on the work done by an electromagnetic field on an atomic or molecular electronic system, a general gauge invariant formulation of transient absorption spectroscopy is presented within the semi-classical approximation. ...