  Many disordered systems show a superdiffusive dynamics, intermediate between
the diffusive one, typical of a classical stochastic process, and the so called
ballistic behaviour, which is generally expected for the spreading in a quantum
process. We have experimentally investigated the superdiffusive behaviour of a
quantum walk (QW), whose dynamics can be related to energy transport phenomena,
with a resolution which is high enough to clearly distinguish between different
disorder regimes. By our experimental setup, the region between ballistic and
diffusive spreading can be effectively scanned by suitably setting few degrees
of freedom and without applying any decoherence to the QW evolution.
