title: Topologically protected localised states in spin chains.
abstract: 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.
authors.affiliation: Department of Physics, University of York, York YO10 5DD, United Kingdom.
authors.forename: Marta P
authors.initials: MP
authors.lastname: Estarellas
authors.affiliation: Department of Physics, University of York, York YO10 5DD, United Kingdom.
authors.forename: Irene
authors.initials: I
authors.lastname: D'Amico
authors.affiliation: Department of Physics, University of York, York YO10 5DD, United Kingdom.
authors.forename: Timothy P
authors.initials: TP
authors.lastname: Spiller