A hopfion is a topological soliton. It is a stable three-dimensional localised configuration of a three-component field n → = ( n x , n y , n z ) {\displaystyle {\vec {n}}=(n_{x},n_{y},n_{z})} of unit length with a knotted topological structure.
A hopfion is a topological soliton. It is a stable three-dimensional localised configuration of a three-component field n → = ( n x , n y , n z ) {\displaystyle {\vec {n}}=(n_{x},n_{y},n_{z})} of unit length with a knotted topological structure.
Source: Wikipedia "Hopfion" · CC BY-SA 4.0
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