A Peculiar Protected Structure Links Viking Knots With Quantum Vortices A vortex structure that is impervious to decay has been identified through mathematical analysis. In a new study, scientists at Aalto University in Finland have demonstrated how three vortices can be linked in a way that pre
In Borromean rings, each circle holds the pattern together by passing through the other two circles. Credit: Alexandr Kakinen / Aalto UniversityA vortex structure that is impervious to decay has been identified through mathematical analysis.
“In a Bose-Einstein condensate, the link structure is somewhere between the two,” says Annala, who began working on this in Professor Mikko Möttönen’s research group at Aalto University before moving back to the University of British Columbia and then to the Institute for Advanced Study in Princeton. Roberto Zamora-Zamora, a postdoctoral researcher in Möttönen’s group, was also involved in the study.
The valknut is a symbol consisting of three interlocked triangles and appears on a variety of objects from the archaeological record of the ancient Germanic peoples. Scholars have proposed a variety of explanations for the symbol, sometimes associating it with the god Odin.The structure is conceptually similar to the Borromean rings, a pattern of three interlinked circles which has been widely used in symbolism and as a coat of arms.
“To our surprise, these topologically protected links and knots had not been invented before. This is probably because the link structure requires vortices with three different types of flow, which is much more complex than the previously considered two-vortex systems,” says Möttönen.
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