A Consistent Holographic Analysis of Anomaly-induced Charge Transport in the D3/D7 Model

Abstract

We propose a scheme to correctly incorporate the contribution of the chiral anomaly in the D3/D7 model to calculate chiral transport phenomena. To ensure the D7-brane wraps S^5 appropriately and the Wess-Zumino term is switched on, we allow the D7-brane to rotate in the compactified extra directions and perform the analysis accordingly. To demonstrate that this calculation procedure works well, we specifically compute the magnetoresistance in the D3/D7 model. We find that a finite axial chemical potential is realized and the negative magnetoresistance is enhanced by the anomaly contribution.

Comments: v1: 19 pages, 2 figures, v2: 20 pages, 2 figures, reference added, accepted version for publication in JHEP