Variable range hopping and quantum creep in one dimension

Abstract

We study the quantum non linear response to an applied electric field $E$ of a one dimensional pinned charge density wave or Luttinger liquid in presence of disorder. From an explicit construction of low lying metastable states and of bounce instanton solutions between them, we demonstrate quantum creep $v=e^{-c/E^{1/2}}$ as well as a sharp crossover at $E=E^{\ast }$ towards a linear response form consistent with variable range hopping arguments, but dependent only on electronic degrees of freedom.

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• Vortex-glass phases in type-II superconductors
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