Quasi-normal modes of holographic system with Weyl correction and momentum dissipation

TL;DR

This paper investigates the quasi-normal modes and charge response of a holographic system with Weyl correction and momentum dissipation, revealing how dissipation strength affects pole structures and electromagnetic duality.

Contribution

It provides a detailed analysis of how momentum dissipation influences the pole structure and electromagnetic duality in holographic systems with Weyl corrections.

Findings

Weak dissipation preserves pole structure similar to no dissipation case.

Strong dissipation shifts poles to the imaginary axis, breaking duality.

Electromagnetic duality approximately holds for the dominant pole when Weyl coupling is reversed.

Abstract

We study the charge response in complex frequency plane and the quasi-normal modes (QNMs) of the boundary quantum field theory with momentum dissipation dual to a probe generalized Maxwell system with Weyl correction. When the strength of the momentum dissipation $\hat{\alpha}$ is small, the pole structure of the conductivity is similar to the case without the momentum dissipation. The qualitative correspondence between the poles of the real part of the conductivity of the original theory and the ones of its electromagnetic (EM) dual theory approximately holds when $\gamma\rightarrow -\gamma$ with $\gamma$ being the Weyl coupling parameter. While the strong momentum dissipation alters the pole structure such that most of the poles locate at the purely imaginary axis. At this moment, the correspondence between the poles of the original theory and its EM dual one is violated when $\gamma\rightarrow -\gamma$. In addition, for the dominant pole, the EM duality almost holds when $\gamma\rightarrow -\gamma$ for all $\hat{\alpha}$ except for a small region of $\hat{\alpha}$.