  Anderson localisation is an important phenomenon arising in many areas of
physics, and here we explore it in the context of quantum information devices.
Finite dimensional spin chains have been demonstrated to be important devices
for quantum information transport, and in particular can be engineered to allow
for "perfect state transfer" (PST). Here we present extensive investigations of
disordered PST spin chains, demonstrating spatial localisation and transport
retardation effects, and relate these effects to conventional Anderson
localisation. We provide thresholds for Anderson localisation in these finite
quantum information systems for both the spatial and the transport domains.
Finally, we consider the effect of disorder on the eigenstate and energy
spectrum of our Hamiltonian, where results support our conclusions on the
presence of Anderson localisation.
