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

TL;DR

This paper presents a holographic approach to accurately incorporate chiral anomaly effects in the D3/D7 model, revealing enhanced negative magnetoresistance due to anomaly contributions.

Contribution

It introduces a novel scheme to correctly include the chiral anomaly in the D3/D7 holographic model by rotating the D7-brane and analyzing the Wess-Zumino term.

Findings

Finite axial chemical potential is realized.

Negative magnetoresistance is enhanced by anomaly effects.

The proposed method accurately captures anomaly-induced transport phenomena.

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.