The first demonstration of braiding in photonic topological zero modes

The first demonstration of braiding in photonic topological zero modes
Schematic depiction of the structure that performs the braiding process with light. (a) Waveguide array structure, where light is braided opposite directions in the two arrays, and then interfered; (b) diagram showing the displacement of waveguide array coordinates required to perform the braiding operation, where alpha denotes the angle of a ‘vortex at infinity’ that is braided around the array. Credit: Noh et al.

Physics theory suggests that exotic excitations can exist in the form of bound states confined in the proximity of topological defects, for instance, in the case of Majorana zero modes that are trapped in vortices within topological superconducting materials. Better understanding these states could aid the development of new computational tools, including quantum technologies.


One phenomenon that has attracted attention over the past few years is “braiding,” which occurs when electrons in particular states (i.e., Majorana fermions) are braided with one another. Some physicists have theorized

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