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arXiv 1410.7811hep-thcond-mat.str-elgr-qc
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二维DCFT的弯曲膜

Bending branes for DCFT in two dimensions

Johanna Erdmenger, Mario Flory, Max-Niklas Newrzella

摘要:

考虑了缺陷共形场论的全息对偶模型,其中包含了缺陷对对偶几何的反作用。特别地,我们考虑了一个对偶引力系统,其中一个二维的超曲面与物质场,膜,嵌入到一个三维的渐近Anti-de Sitter时空。受最近提出的边界共形场论(BCFT)的全息投影的启发,我们假设膜的几何形状由以色列结条件决定。我们表明,这些条件是密切相关的膜物质场的能量条件,并解释这些能量条件如何约束可能的几何形状。这对全息纠缠熵有特别的影响。此外,我们给出了精确的解析解的情况下,膜的物质含量是一个完美的流体,在特定的情况下,对应于一个自由的无质量的标量场。最后,我们描述了我们的结果可能是特别有用的全息近藤模型的扩展最近的建议。

英文摘要:

We consider a holographic dual model for defect conformal field theories (DCFT) in which we include the backreaction of the defect on the dual geometry. In particular, we consider a dual gravity system in which a two-dimensional hypersurface with matter fields, the brane, is embedded into a three-dimensional asymptotically Anti-de Sitter spacetime. Motivated by recent proposals for holographic duals of boundary conformal field theories (BCFT), we assume the geometry of the brane to be determined by Israel junction conditions. We show that these conditions are intimately related to the energy conditions for the brane matter fields, and explain how these energy conditions constrain the possible geometries. This has implications for the holographic entanglement entropy in particular. Moreover, we give exact analytical solutions for the case where the matter content of the brane is a perfect fluid, which in a particular case corresponds to a free massless scalar field. Finally, we describe how our results may be particularly useful for extending a recent proposal for a holographic Kondo model.

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