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Hydrodynamic excitations from chiral kinetic theory and the hydrodynamic frames

  • Navid Abbasi
  • Farid Taghinavaz
  • Kiarash Naderi
Open Access
Regular Article - Theoretical Physics
  • 63 Downloads

Abstract

In the framework of chiral kinetic theory (CKT), we consider a system of right-and left-handed Weyl fermions out of thermal equilibrium in a homogeneous weak magnetic field. We show that the Lorentz invariance implies a modification in the definition of the momentum current in the phase space, compared to the case in which the system is in global equilibrium. Using this modified momentum current, we derive the linearized conservation equations from the kinetic equation up to second order in the derivative expansion. It turns out that the eigenmodes of these equations, namely the hydrodynamic modes, differ from those obtained from the hydrodynamic in the Landau-Lifshitz (LL) frame at the same order. We show that the modes of the former case may be transformed to the corresponding modes in the latter case by a global boost. The velocity of the boost is proportional to the magnetic field as well as the difference between the right- and left-handed charges susceptibility. We then compute the chiral transport coefficients in a system of non-Abelian chiral fermions in the no-drag frame and by making the above boost, obtain the well-known transport coeffiecients of the system in the LL frame. Finally by using the idea of boost, we reproduce the AdS/CFT result for the chiral drag force exerted on a quark at rest in the rest frame of the fluid, without performing any holographic computations.

Keywords

AdS-CFT Correspondence Holography and quark-gluon plasmas 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2018

Authors and Affiliations

  • Navid Abbasi
    • 1
  • Farid Taghinavaz
    • 1
  • Kiarash Naderi
    • 2
  1. 1.School of Particles and AcceleratorsInstitute for Research in Fundamental Sciences (IPM)TehranIran
  2. 2.Department of PhysicsSharif University of TechnologyTehranIran

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