Fundamental Landau Levels in a Strongly Coupled Plasma

Abstract

We use the gauge/gravity correspondence to show that in its context there appear Landau levels when studying the excitations of the fundamental degrees of freedom of a strongly coupled plasma subject to a magnetic field of arbitrary intensity. We work in the phase where mesons are melted by embedding a D7-brane in the 10D uplift that we construct for the 5D background associated to a magnetic brane. By studying the dependence of the lowest quasinormal frequency on both, the intensity of the magnetic field and the Landau level, we corroborate that the energy behaves as expected for dissociating Landau levels. The reconstruction of the impact of the magnetic field on the stability of the quasinormal modes allows us to identify inverse magnetic catalysis for intensities of the field bellow a certain value, and magnetic catalysis for those above it.

This version includes the calculation of the quasinormal modes of the dual scalar excitations, and presents the behavior of their energy as evidence that the evolution of such modes describes dissociating Landau levels. The study of the width of the modes was also added, showing that inverse magnetic catalysis and magnetic catalysis occur for different ranges of the magnetic field

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