Chiral magnetic effect and holography

Understand

The chiral magnetic effect (CME) is a highly discussed effect in heavy-ion collisions stating that, in the presence of a magnetic field B, an electric current is generated in the background of topologically nontrivial gluon fields.

• We present a holographic (AdS/CFT) description of the CME in terms of a fluid-gravity model which is dual to a strongly-coupled plasma with multiple anomalous U(1) currents.
• In the case of two U(1) charges, one axial and one vector, the CME formally appears as a first-order transport coefficient in the vector current.
• We will holographically compute this coefficient at strong coupling and compare it with the hydrodynamic result.