Speaker
Prof.
Vieri Mastropietro
(Universita' di Milano)
Description
We consider interacting electrons in a one dimensional lattice with an incommensurate Aubry-Andre' potential in the regime when the single-particle eigenstates are localized. We rigorously establish persistence of ground state localization in presence of weak many-body interaction, for almost all the chemical potentials. The proof uses a quantum many body extension of methods adopted for the stability of
tori of nearly integrable hamiltonian systems, and relies on number-theoretic properties of the potential incommensurate frequency.
