Russian Doll Renormalization Group and Superconductivity
arXiv:cond-mat/0211338 · doi:10.1103/PhysRevB.69.020505
Abstract
We show that an extension of the standard BCS Hamiltonian leads to an infinite number of condensates with different energy gaps and self-similar properties, described by a cyclic RG flow of the BCS coupling constant which returns to its original value after a finite RG time.
4 pages, 2 figs, RevTex4