Browsing Bergen Open Research Archive by Author "Selstø, Sølve"
Now showing items 1-6 of 6
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Alternative gauge for the description of the light-matter interaction in a relativistic framework
Selstø, Sølve; Kjellsson, Tor; Lindroth, Eva; Simonsen, Aleksander; Førre, Morten (Peer reviewed; Journal article, 2017-08)We present a generalized velocity gauge form of the relativistic laser-matter interaction. In comparison with the (equivalent) regular minimal coupling description, this form of light-matter interaction results in superior ... -
Contributions to the Theory of Atoms and Molecules in Strong Electromagnetic Fields
Selstø, Sølve (Doctoral thesis, 2006-09-29) -
Ionization dynamics beyond the dipole approximation induced by the pulse envelope
Simonsen, Aleksander; Kjellsson, Tor; Førre, Morten; Lindroth, Eva; Selstø, Sølve (Peer reviewed; Journal article, 2016-05)When atoms and molecules are ionized by laser pulses of finite duration and increasingly high intensities, the validity of the much-used dipole approximation, in which the spatial dependence and magnetic component of the ... -
Relativistic effects in photoionizing a circular Rydberg state in the optical regime
Kjellsson Lindblom, Tor Hugo Iwao; Lindroth, Eva; Førre, Morten; Selstø, Sølve (Journal article; Peer reviewed, 2020)We study the photoionization process of a hydrogen atom initially prepared in a circular Rydberg state. The atom is exposed to a two-cycle laser pulse with a central wavelength of 800 nm. Before the atom approaches saturation, ... -
Schrödinger formulation of the nondipole light-matter interaction consistent with relativity
Førre, Morten; Selstø, Sølve (Journal article; Peer reviewed, 2020)An alternative and powerful Schrödinger-like equation for describing beyond dipole laser-matter interactions and leading relativistic corrections is derived. It is shown that this particular formulation is numerically very ... -
Semirelativistic Schrödinger Equation for Relativistic Laser-Matter Interactions
Kjellsson Lindblom, Tor; Førre, Morten; Lindroth, Eva; Selstø, Sølve (Peer reviewed; Journal article, 2018-12)A semirelativistic formulation of light-matter interaction is derived using the so called propagation gauge and the relativistic mass shift. We show that relativistic effects induced by a superintense laser field can, to ...