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arXiv 2302.01206hep-thmath.RT
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隐对称代数的矩阵和张量见证

Matrix and tensor witnesses of hidden symmetry algebras

Sanjaye Ramgoolam, Lewis Sword

摘要:

置换群代数及其推广称为置换中心化代数(PCA),在具有明显连续规范对称性的大$N$规范理论和矩阵模型的组合学中作为隐藏对称起着核心作用。多项式函数在显式对称下不变是感兴趣的观测量,并在AdS/CFT中有应用。我们在存在矩阵或张量见证的情况下计算这样的相关器,根据定义,矩阵或张量见证可以包括作为作用量中的耦合(即spuron)出现的矩阵或张量场,或者作为可观测量中的经典(未积分)场出现,与量子(积分)场一起出现。在矩阵和张量的情况下,我们发现,一般规范不变观测量的两点算符可以写在见证场的规范不变函数方面,与相关PCA的结构常数给出的系数。傅立叶变换的相关PCA,将组合基础表示理论的基础。表示理论的基本元素服从正交性结果的两点的正交性,其中一般已知的正交关系的情况下,见证字段。新的正交性方程包括两个代表性的基础元素作为输入的观察和一个代表性的基础观察构造纯粹从见证场作为输出。这些方程扩展了Mironov和Morozov发起的超可积性计划中的已知方程,并且是矩阵/张量模型的隐藏置换中心化代数的Wedderburn-Artin分解的直接物理实现。

英文摘要:

Permutation group algebras, and their generalizations called permutation centralizer algebras (PCAs), play a central role as hidden symmetries in the combinatorics of large $N$ gauge theories and matrix models with manifest continuous gauge symmetries. Polynomial functions invariant under the manifest symmetries are the observables of interest and have applications in AdS/CFT. We compute such correlators in the presence of matrix or tensor witnesses, which by definition, can include a matrix or tensor field appearing as a coupling in the action (i.e a spurion) or as a classical (un-integrated) field in the observables, appearing alongside quantum (integrated) fields. In both matrix and tensor cases we find that two-point correlators of general gauge-invariant observables can be written in terms of gauge invariant functions of the witness fields, with coefficients given by structure constants of the associated PCAs. Fourier transformation on the relevant PCAs, relates combinatorial bases to representation theoretic bases. The representation theory basis elements obey orthogonality results for the two-point correlators which generalise known orthogonality relations to the case with witness fields. The new orthogonality equations involve two representation basis elements for observables as input and a representation basis observable constructed purely from witness fields as the output. These equations extend known equations in the super-integrability programme initiated by Mironov and Morozov, and are a direct physical realization of the Wedderburn-Artin decompositions of the hidden permutation centralizer algebras of matrix/tensor models.

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