79 citations · 125 across the 9 of their papers we have counts for
9 papers
Transient spectroscopy from time-dependent electronic-structure theory without multipole expansions
Einar Aurbakken, Benedicte Sverdrup Ofstad, Håkon Emil Kristiansen +5
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 presen…
An atomistic description of alloys and core shells nanoparticles
Lasse K. Sørensen, Anton D. Utyushev, Vadim I. Zakomirnyi +1
Using the extended discrete interaction model we investigate the tuneabilty of surface plasmon resonance in alloys and core-shell nanoparticles made from silver and gold. We show t…
Transformation to a geminal basis and stationary conditions for the exact wave function therein
Lasse Kragh Sørensen
We show the transformation from a one-particle basis to a geminal basis, transformations between different geminal bases and demonstrate the Lie algebra of a geminal basis. From th…
Implementation of the exact semi-classical light-matter interaction - the easy way
Lasse Kragh Sørensen, Emil Kieri, Shruti Srivastav +2
We present an analytical and numerical solution of the calculation of the transition moments for the exact semi-classical light-matter interaction for wavefunctions expanded in a G…
The Integral- and Intermediate-Screened Coupled-Cluster Method
L. K. Sørensen
We present the formulation and implementation of the integral- and intermediate-screened coupled-cluster method (ISSCC). The IISCC method gives a simple and rigorous integral and i…
The Integral Screened Configuration Interaction Method
Lasse Kragh Sørensen, Sebastian Bauch, Lars Bojer Madsen
We present the formulation and implementation of the Integral-Screened Configuration-Interaction method (ISCI). The ISCI is a minimal-operational count integral-driven direct Confi…
What do we approximate and what are the consequences in perturbation theory?
Lasse Kragh Sørensen, Roland Lindh, Marcus Lundberg
We present a discussion of the consequences in perturbation theory when an exact eigenfunctions and eigenvalues to to the zeroth order Hamiltonian cannot be found. Since the…
Correlation effects in strong-field ionization of heteronuclear diatomic molecules
Henrik R. Larsson, Sebastian Bauch, Lasse Kragh Sørensen +1
We develop a time-dependent theory to investigate electron dynamics and photoionization processes of diatomic molecules interacting with strong laser fields including electron-elec…
Time-dependent generalized-active-space configuration-interaction approach to photoionization dynamics of atoms and molecules
Sebastian Bauch, Lasse Kragh Sørensen, Lars Bojer Madsen
We present a wave-function based method to solve the time-dependent many-electron Schrödinger equation (TDSE) with special emphasis on strong-field ionization phenomena. The theory…