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The Halon: A Quasiparticle Featuring Critical Charge Fractionalization
Boris Svistunov (University of Massachussetts Amherst)
I will present two quite different examples of a new impurity driven quantum criticality associated with a sharply defined integer charge of a quasiparticle (polaron). On the approach to the critical point, the charge distribution splits into a fractionally charged core and a critically large halo carrying the complementary charge.