Dynamics of Non-supersymmetric Flavours

TL;DR

This paper explores how non-supersymmetric probe flavors influence the geometry and phase structure in a holographic model, revealing complex thermodynamic behavior and the significance of the Landau pole as a UV cutoff.

Contribution

It introduces a detailed analysis of back-reacted geometries with non-supersymmetric probes and studies the phase structure under electromagnetic fields and chemical potentials.

Findings

Landau pole acts as a UV cutoff affecting thermodynamics

Richer phase structure due to indistinguishable probe and back-reacting flavors

Detailed characterization of phase transitions in the model

Abstract

We investigate the effect of the back-reaction by non-supersymmetric probes in the Kuperstein-Sonnenschein model. In the limit where the back-reaction is small, we discuss physical properties of the back-reacted geometry. We further introduce additional probe flavours in this back-reacted geometry and study in detail the phase structure of this sector when a constant electromagnetic field or a chemical potential are present. We find that the Landau pole, which serves as the UV cut-off of the background geometry, also serves as an important scale in the corresponding thermodynamics of the additional flavour sector. We note that since these additional probe flavours are indistinguishable from the back-reacting flavours, the results we obtain point to a much richer phase structure of the system.