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arXiv 1201.1702hep-th
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共形场论和全息中的纠缠Renyi熵

Entanglement Renyi Entropies in Conformal Field Theories and Holography

Dmitri V. Fursaev

摘要:

在共形理论中研究了系统空间分区的纠缠Renyi熵,共形理论允许反de Sitter引力的对偶描述。在四维共形N=4的超Yang-Mills理论中计算了弱耦合下Renyi熵的发散部分。这个结果被用来建议全息公式,再现Renyi熵至少在领先的近似。全息Renyi熵是体几何中余维为2的极小超曲面上的不变泛函集。体空间不依赖于Renyi熵的阶$n$。全息Renyi熵是局部和非局部泛函乘以$1/n$的多项式的和。

英文摘要:

An entanglement Renyi entropy for a spatial partition of a system is studied in conformal theories which admit a dual description in terms of an anti-de Sitter gravity. The divergent part of the Renyi entropy is computed in 4D conformal N=4 super Yang-Mills theory at a weak coupling. This result is used to suggest a holographic formula which reproduces the Renyi entropy at least in the leading approximation. The holographic Renyi entropy is an invariant functional set on a codimension 2 minimal hypersurface in the bulk geometry. The bulk space does not depend on order $n$ of the Renyi entropy. The holographic Renyi entropy is a sum of local and non-local functionals multiplied by polynomials of $1/n$.

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