Non-local Adiabatic Response of a Localized System to Local Manipulations
arXiv:1411.2616 · doi:10.1038/nphys3344
Abstract
We examine the response of a system localized by disorder to a time dependent local perturbation which varies smoothly with a characteristic timescale . We find that such a perturbation induces a non-local response, involving a rearrangement of conserved quantities over a length scale . This effect lies beyond linear response, is absent in undisordered insulators and highlights the remarkable subtlety of localized phases. The effect is common to both single particle and many body localized phases. Our results have implications for numerous fields, including topological quantum computation in quantum Hall systems, quantum control in disordered environments, and time dependent localized systems. For example, they indicate that attempts to braid quasiparticles in quantum Hall systems or Majorana nanowires will surely fail if the manipulations are performed asymptotically slowly, and thus using such platforms for topological quantum computation will require considerable engineering. They also establish that disorder localized insulators suffer from a statistical orthogonality catastrophe.
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