Extended Data Fig. 2: Schematic illustration of the rules for the momentum-space braiding of non-Abelian topological nodes and their charge conversions with the Dirac strings (DSs).
From: Experimental observation of non-Abelian topological acoustic semimetals and their phase transitions
The left column shown the effect of a DS residing in the second gap on nodes in the first gap. The charge inversion processes of pulling a first-gap node through this DS or subsequently retracting the string over the other DS that connects the pair in the first gap is illustrated in the bottom panels, respectively. The right column depicts the recombination rules of Dirac strings as outlined in the main text. Every panel is merely a different representation of the same physics.
