Nucleation of Ergodicity by a Single Mobile Impurity in Supercooled Insulators
Nucleation of Ergodicity by a Single Mobile Impurity in Supercooled Insulators
We consider a disordered Hubbard model, and show that, at sufficiently weak disorder, a single spin-down mobile impurity can thermalize an extensive initially localized system of spin-up particles. Thermalization is enabled by resonant processes which involve correlated hops of the impurity and localized particles. This effect indicates that certain localized …