Flavor-symmetry Breaking with Charged Probes

Abstract

We discuss the recombination of brane/anti-brane pairs carrying $D3$ brane charge in $Ad{S}_5\times S^5$. These configurations are dual to co-dimension one defects in the $\mathcal{N}=4$ super-Yang-Mills description. Due to their $D3$ charge, these defects are actually domain walls in the dual gauge theory, interpolating between vacua of different gauge symmetry. A pair of unjoined defects each carry localized $(2+1)$ dimensional fermions and possess a global $U(N)\times U(N)$ flavor symmetry while the recombined brane/anti-brane pairs exhibit only a diagonal U(N). We study the thermodynamics of this flavor-symmetry breaking under the influence of external magnetic field.

21 pages, 10 figures

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• D3-D7 Holographic dual of a perturbed 3D CFT
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• Holographic Wilson Loops, Dielectric Interfaces, and Topological Insulators
• Domain Wall Fermions on the Brane