Anomalous Transport from Gauge Fields and Holography

Abstract

Since the inception of quantum anomalies in the 1960’s, the topic has come to be generally quite well-understood. Nonetheless, it is still not clear how exactly anomalous effects can be observed on a macroscopic scale within the context of particle physics. Through hydrodynamic considerations, one finds that certain anomalies could macroscopically produce what is known as anomalous response, a process giving rise to P-odd, T -even transport phenomena. The associated anomalous conductivities have been computed in the absence of dynamical gluons using a variety of approaches, which have lead to the belief that the conductivities obey a universality restriction. We attempt to compute radiative corrections to such universal values by including dynamical gluons within the setting of the quark gluon plasma. Due to the difficulty of studying quantum chromodynamics using perturbation theory, we compute the conductivities using a holographic model, namely V-QCD. Our model recovers the universal values of the conductivities in the absence of dynamical gluons. After including such dynamical effects, we observe no radiative corrections to the Chiral Magnetic Effect or Chiral Vortical Effect. However, we find that the Chiral Separation Effect does receive radiative corrections.