Abstract
In the background of a charged AdS black hole, we consider a Dirac particle endowed with an arbitrary magnetic dipole moment. For non-zero charge and dipole coupling of the bulk fermion, we find that the dual boundary theory can be plagued with superluminal modes. Requiring consistency of the dual CFT amounts to constraining the strength of the dipole coupling by an upper bound. We briefly discuss the implications of our results for the physics of holographic non-Fermi liquids.
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Kulaxizi, M., Rahman, R. Fermion dipole moment and holography. J. High Energ. Phys. 2015, 1–14 (2015). https://doi.org/10.1007/JHEP12(2015)146
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DOI: https://doi.org/10.1007/JHEP12(2015)146