  In the present article, we discuss the role played by the interaction in the
Anderson localization problem, for a system of interacting fermions in a
one-dimensional disordered lattice, described by the Fermi Hubbard Hamiltonian,
in presence of an on-site random potential. We show that, given the proper
identification of the elementary excitations of the system described in terms
of doublons and unpaired particles, the Anderson localization picture survives.
Ensuing a "global quench", we show that the system exhibits a rich localization
scenario, which can be ascribed to the nearly-free dynamics of the elementary
excitations of the Hubbard Hamiltonian.

Quantum Gases