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arXiv 0709.1365hep-th
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AdS/CFT correspondence中不同权算子的四点函数

Four-point functions of different-weight operators in the AdS/CFT correspondence

León Berdichevsky, Pieter Naaijkens

摘要:

在超引力近似的大N极限下,计算了\mathcal{N} =4 SYM中两个权为2和两个权为3的1/2-BPS算符的四点关联函数.根据AdS/CFT猜想,这些算符与质量分别为m^2 = -4和m^2 = -3的AdS超引力标量场s_2和s_3是对偶的.这是最低共形维数的混合权算子的第一个非平凡四点函数。我们证明了超引力诱导的四点函数分裂为“自由”部分和“量子”部分,其中量子贡献服从来自规范理论中插入过程的非平凡约束,特别地,它只依赖于共形交比的一个函数.

英文摘要:

We calculate four-point correlation functions of two weight-2 and two weight-3 1/2-BPS operators in \mathcal{N}=4 SYM in the large N limit in supergravity approximation. By the AdS/CFT conjecture, these operators are dual to AdS supergravity scalar fields s_2 and s_3 with mass m^2 = -4 and m^2 = -3 respectively. This is the first non-trivial four-point function of mixed-weight operators of lowest conformal dimensions. We show that the supergravity-induced four-point function splits into a "free" and a "quantum" part, where the quantum contribution obeys non-trivial constraints coming from the insertion procedure in the gauge theory, in particular, it depends on only one function of the conformal cross-ratios.

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