  We consider spin chain families inspired by the Su, Schrieffer and Hegger
(SSH) model. We demonstrate explicitly the topologically induced spatial
localisation of quantum states in our systems. We present detailed
investigations of the effects of random noise, showing that these topologically
protected states are very robust against this type of perturbation. Systems
with such topological robustness are clearly good candidates for quantum
information tasks and we discuss some potential applications. Thus, we present
interesting spin chain models which show promising applications for quantum
devices.

Quantum Physics