Magneto-roton excitation in a holographic quantum Hall fluid

TL;DR

This paper investigates the excitation spectrum of a holographic quantum Hall fluid, revealing stable, gapped behavior with low-lying excitations including a magneto-roton, similar to real quantum Hall systems.

Contribution

It demonstrates the presence of magneto-roton excitations in a holographic model, providing insights into strongly correlated quantum Hall states via gauge/gravity duality.

Findings

System is stable and gapped.

Exhibits low-lying excitations similar to quantum Hall fluids.

Includes a magneto-roton excitation spectrum.

Abstract

We compute the neutral bosonic excitation spectra of the holographic quantum Hall fluid described by the D3-D7' system. We find that the system is stable, gapped, and, in a range of parameters, exhibits a spectrum of low-lying excitations very similar to that of a quantum Hall fluid, including a magneto-roton excitation.