66 citations · 439 across the 20 of their papers we have counts for
20 papers
Interatomic Fe-Cr potential for modeling kinetics on Fe surfaces
Pekko Kuopanportti, Matti Ropo, Daniel Holmberg +4
To enable accurate molecular dynamics simulations of iron-chromium alloys with surfaces, we develop, based on density-functional-theory (DFT) calculations, a new interatomic Fe-Cr…
Creation of a Dirac monopole-antimonopole pair in a spin-1 Bose-Einstein condensate
Konstantin Tiurev, Pekko Kuopanportti, Mikko Möttönen
We theoretically demonstrate that a pair of Dirac monopoles with opposite synthetic charges can be created within a single spin-1 Bose-Einstein condensate by steering the spin degr…
Splitting of singly and doubly quantized composite vortices in two-component Bose-Einstein condensates
Pekko Kuopanportti, Soumik Bandyopadhyay, Arko Roy +1
We study numerically the dynamical instabilities and splitting of singly and doubly quantized composite vortices in two-component Bose-Einstein condensates harmonically confined to…
Determining the interspecies interaction strength of a two-species Bose-Einstein condensate from the density profile of one species
P. Kuopanportti, Y. M. Liu, Y. Z. He +1
We study harmonically trapped two-species Bose-Einstein condensates within the Gross-Pitaevskii formalism. By invoking the Thomas-Fermi approximation, we derive an analytical solut…
Three-dimensional splitting dynamics of giant vortices in Bose-Einstein condensates
Jukka Räbinä, Pekko Kuopanportti, Markus Kivioja +2
We study the splitting dynamics of giant vortices in dilute Bose-Einstein condensates by numerically integrating the three-dimensional Gross-Pitaevskii equation in time. By taking…
Three-dimensional skyrmions in spin-2 Bose-Einstein condensates
K. Tiurev, T. Ollikainen, P. Kuopanportti +3
We introduce topologically stable three-dimensional skyrmions in the cyclic and biaxial nematic phases of a spin-2 Bose-Einstein condensate. These skyrmions exhibit exceptionally h…