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Tangled 'particle' helps scientists model rare ball lightning


Ball lightning (those bright spheres of light during some thunderstorms) remains mysterious despite decades of study. But how are you supposed to get a better look at it in a lab? Researchers might have discovered how through a happy accident: create a tangled atomic mess. They created a Shankar skyrmion, a quasiparticle whose artificial magnetic field, it turns out, mimics the electrical and magnetic fields of ball lightning. The team applied a magnetic field to a Bose-Einstein condensate (a state of matter for boson gas cooled to near absolute zero), in this case made of rubidium, to get the atoms to spin along the surface of a ball yet twist inside that ball.



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