TL;DR
This paper reviews holographic models of large N QCD under magnetic fields, focusing on magnetic catalysis, phase diagrams, and effects on physical properties like viscosity and quark potential.
Contribution
It extends holographic QCD models to include magnetic phenomena, analyzing their impact on QCD ground state, phase structure, and physical observables.
Findings
Magnetic fields influence chiral condensate and induce (inverse) magnetic catalysis.
Phase diagram of holographic QCD is mapped as a function of magnetic field, temperature, and chemical potential.
Magnetic fields affect quark-antiquark potential, shear viscosity, and other physical properties.
Abstract
We review the holographic approach to electromagnetic phenomena in large N QCD. After a brief discussion of existing holographic models, we concentrate on the improved holographic QCD model extended to include magnetically induced phenomena. We explore the influence of magnetic fields on the QCD ground state, focusing on (inverse) magnetic catalysis of chiral condensate, investigate the phase diagram of the theory as a function of magnetic field, temperature and quark chemical potential, and, finally discuss effects of magnetic fields on the quark-anti-quark potential, shear viscosity, speed of sound and magnetization.
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