53 citations · 215 across the 13 of their papers we have counts for
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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…
Quantum knots in Bose-Einstein condensates created by counterdiabatic control
T. Ollikainen, S. Masuda, M. Möttönen +1
We theoretically study the creation of knot structures in the polar phase of spin-1 BECs using the counterdiabatic protocol in an unusual fashion. We provide an analytic solution t…
Quantum Gates for Propagating Microwave Photons
Roope Kokkoniemi, Tuomas Ollikainen, Russell E. Lake +6
We report a generic scheme to implement transmission-type quantum gates for propagating microwave photons, based on a sequence of lumped-element components on transmission lines. B…