Holographic chiral currents in a magnetic field
arXiv:1007.2494 · doi:10.1143/PTPS.186.463
Abstract
In the presence of a quark chemical potential, a magnetic field induces an axial current in the direction of the magnetic field. We compute this current in the Sakai-Sugimoto model, a holographic model which, in a certain limit, is dual to large-N_c QCD. We also compute the analogous vector current, for which an axial chemical potential is formally introduced. This vector current can potentially be observed via charge separation in heavy-ion collisions. After implementing the correct axial anomaly in the Sakai-Sugimoto model we find an axial current in accordance with previous studies and a vanishing vector current, in apparent contrast to previous weak-coupling calculations.
8 pages, to appear in the proceedings of "New Frontiers in QCD 2010", Yukawa Institute for Theoretical Physics, Kyoto, Japan, Jan 18 - Mar 19, 2010
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Cited by in corpus (6)
- Anomalous transport coefficients from Kubo formulas in Holography
- Foundations and Applications of Quantum Kinetic Theory
- Kinetic equations for massive Dirac fermions in electromagnetic field with non-Abelian Berry phase
- A chiral magnetic spiral in the holographic Sakai-Sugimoto model
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- Anomalous Zero Sound