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Paper   IPM / Physic / 14655
School of Physics
  Title:   Holographic Equilibration under External Dynamical Electric Field
  Author(s): 
1.  M. Ali-Akbari
2.  F. Charmchi
  Status:   Preprint
  Journal:
  Year:  2016
  Supported by:  IPM
  Abstract:
The holographic equilibration of a far-from-equilibrium strongly coupled gauge theory is investigated. The dynamics of a probe D7-brane in an AdS-Vaidya background is studied in the presence of an external time-dependent electric field. Defining the equilibration times teqc and teqj, at which condensation and current relax to their final equilibrated values receptively, the smallness of transition time kM or kE is enough to observe a universal behaviour for re-scaled equilibration times kM kE (teqc)−2 and kM kE (teqj)−2. Moreover, regardless of the values for kM and kE, teqc/teqj also behaves universally for large enough value of the ratio of the final electric field to final temperature. Then a simple discussion of the static case reveals that teqcteqj. For an out-of-equilibrium process, our numerical results show that, apart from the cases for which kE is small, the static time ordering persists.

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