Creep of superconducting vortices in the limit of vanishing temperature:   A fingerprint of off-equilibrium dynamics
  We theoretically study the creep of vortex matter in superconductors. The low temperatures experimental phenomenology, previously interpreted in terms of ``quantum tunnelling'' of vortices, is reproduced by Monte Carlo simulations of a purely ``classical'' vortex model. We demonstrate that a non-zero creep rate in the limit of vanishing temperature is to be expected in systems with slow relaxations as a consequence of their off-equilibrium evolution in a complex free energy landscape. 
Mario Nicodemi and Henrik Jeldtoft Jensen