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arXiv 2101.07484hep-th
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具有更多字符模式的自由BMN关联函数

Free BMN Correlators With More Stringy Modes

Bao-ning Du, Min-xin Huang

摘要:

在IIB型最大超对称pp波背景下,用对偶$\mathcal{N}=4$ super-Yang-Mills理论中的BMN(Berenstein-Madalcena-Nastase)算符描述弦激发模.本文继续研究了具有更多弦模的高亏格自由BMN关联函数,主要集中在亏格为1和4的弦模在不同横向方向上的情况。令人惊讶的是,我们发现,环面两点函数的非负性,这是以前提出的概率解释的结果,并已在两个和三个弦模式的情况下得到验证,不再是真正的情况下,四个或更多的弦模式。尽管如此,因子分解公式仍然有效,它也是一个将环面两点函数与弦图计算联系起来的全息字典。我们还检验了平面三点函数与Green-Schwarz弦顶点的对应关系。讨论了在同一横向上存在多个弦模的情况下的一些问题。我们的计算提供了一些新的观点对pp波全息。

英文摘要:

In the type IIB maximally supersymmetric pp-wave background, stringy excited modes are described by BMN (Berenstein-Madalcena-Nastase) operators in the dual $\mathcal{N}=4$ super-Yang-Mills theory. In this paper, we continue the studies of higher genus free BMN correlators with more stringy modes, mostly focusing on the case of genus one and four stringy modes in different transverse directions. Surprisingly, we find that the non negativity of torus two-point functions, which is a consequence of a previously proposed probability interpretation and has been verified in the cases with two and three stringy modes, is no longer true for the case of four or more stringy modes. Nevertheless, the factorization formula, which is also a proposed holographic dictionary relating the torus two-point function to a string diagram calculation, is still valid. We also check the correspondence of planar three-point functions with Green-Schwarz string vertex with many string modes. We discuss some issues in the case of multiple stringy modes in the same transverse direction. Our calculations provide some new perspectives on pp-wave holography.

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