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arXiv 2402.02481hep-th
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AdS 中的圈图:从谱表示到位置空间 III

Loops in AdS: From the Spectral Representation to Position Space III

Dean Carmi

AI总结:

本文利用谱表示研究 AdS 中的自旋场圈振幅,建立不同圈图族间的恒等式,并给出大 N_f 共形标量 QED 的次领头阶四点关联函数、团块图及 k 圈梯形图的解析或积分结果。

摘要:

我们通过谱表示研究反德西特(anti de-Sitter,AdS)空间中的圈振幅。我们考虑含自旋场(尤其是规范场)的圈,并推导出联系不同圈图族的各种恒等式,这些圈图具有不同的圈数、自旋和质量。此类恒等式可用于 Witten 图的计算。针对定义在 AdS 空间上的大 N_f 共形标量 QED 理论,我们推导出 1/N_f 次领头阶精确四点关联函数的解析表达式。此外,我们还为多类图示(我们称之为“团块图(blob diagrams)”)推导出体二点函数和边界四点函数的解析表达式。最后,我们研究含自旋场的四点梯形图,并推导出 k 圈梯形图谱表示的积分表达式。

英文摘要:

We study loop amplitudes in anti de-Sitter space via the spectral representation. We consider loops of spinning fields and in particular gauge fields, and derive various identities connecting different families of loop diagrams, at different number of loops, different spins, different masses. Such identities are useful for the computation of Witten diagrams. Considering the theory of large-$N_f$ conformal scalar QED defined on AdS space, we derive an analytic expression for the exact 4-point correlation function at sub-leading order in $\frac{1}{N_f}$. Additionally, we derive analytic expressions for bulk 2-point functions and boundary 4-point functions for various families of diagrams, which we denote as ``blob diagrams''. Finally we study 4-point ladder diagrams with spinning fields, and we derive integral expressions for the spectral representation of a $k$-loop ladder diagram.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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