arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1908.03974hep-th
收藏

从体环到边界大N展开

From bulk loops to boundary large-N expansion

Dmitry Ponomarev

摘要:

本文研究了欧氏AdS中循环Witten图的共形分波展开式所表示的解析结构。我们表明,在平坦的空间,振幅的奇点与非平凡的削减图和因式分解成产品的系数函数的子图从这些削减。我们考虑一个例子,一个循环的四点图的细节,然后简要讨论如何将该过程可以扩展到更一般的图。最后,我们表明,这种分析再现简单的关系,遵循大N的边界上的考虑。

英文摘要:

We study the analytic structure of loop Witten diagrams in Euclidean AdS represented by their conformal partial wave expansions. We show that, as in flat space, amplitude's singularities are associated with non-trivial cuts of the diagram and factorize into products of the coefficient functions for the subdiagrams resulting from these cuts. We consider an example of a one-loop four-point diagram in detail and then briefly discuss how the procedure can be extended to more general diagrams. Finally, we show that this analysis reproduces simple relations that follow from the large-N considerations on the boundary.

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。

↑