External Fields and Chiral Symmetry Breaking in the Sakai-Sugimoto Model
arXiv:0803.0038 · doi:10.1088/1126-6708/2008/12/053
Abstract
Using the Sakai-Sugimoto model we study the effect of an external magnetic field on the dynamics of fundamental flavours in both the confined and deconfined phases of a large N_c gauge theory. We find that an external magnetic field promotes chiral symmetry breaking, consistent with the "magnetic catalysis" observed in the field theory literature, and seen in other studies using holographic duals. The external field increases the separation between the deconfinement temperature and the chiral symmetry restoring temperature. In the deconfined phase we investigate the temperature-magnetic field phase diagram and observe, for example, there exists a maximum critical temperature (at which symmetry is restored) for very large magnetic field. We find that this and certain other phenomena persist for the Sakai-Sugimoto type models with probe branes of diverse dimensions. We comment briefly on the dynamics in the presence of an external electric field.
26 pages. LaTeX, minor changes
Cited by in corpus (10)
- Inverse magnetic catalysis in dense holographic matter
- Chiral Properties of Strong Interactions in a Magnetic Background
- Magnetic properties of dense holographic QCD
- Anomalous conductivity in holographic QCD
- Meson supercurrents and the Meissner effect in the Sakai-Sugimoto model
- Holographic chiral magnetic spiral
- Holographic Magnetic Phase Transition
- Open Wilson Lines and Chiral Condensates in Thermal Holographic QCD
- Comments on Holographic Fermi Surfaces
- Magnetic Phase Diagram of Dense Holographic Multiquarks in the Quark-gluon Plasma