arXiv 1004.20452010-04-12hep-th

AdS_4/CFT_3对应中的重子对称性和M5膜

Baryonic symmetries and M5 branes in the AdS_4/CFT_3 correspondence

Nessi Benishti, Diego Rodriguez-Gomez, James Sparks

备注：: 92 pages, 10 figures
发表信息：: JHEP 1007:024,2010
DOI：: 10.1007/JHEP07(2010)024

摘要：

本文研究了M2膜在Calabi-Yau四重奇点上AdS_4/CFT_3对应中与Betti多重态对偶的U（1）对称性。AdS_4中矢量场的边界条件的分析允许在这样的对称性下可以考虑携带非零电荷的包裹M5膜态的选择。我们首先集中在孤立的环面奇点没有消失的六个循环，并详细研究了锥上Q^{111}。所考虑的边界条件与规范群为U（1）^2 x SU（N）^4的CFT是对偶的。我们发现该理论中规范不变重子型算子的谱与包裹的M5膜态的谱之间存在一致性。此外，这些对称性自发破缺的真空物理学与涉及奇点解析的对偶引力分析精确匹配，在那里我们能够匹配重子算子、戈德斯通玻色子和全局弦的凝聚。我们还认为，更一般的理论，其中的决议有六个周期，预计收到非微扰修正M5膜瞬子。我们给出了一个将瞬子作用量与可归一化的调和二形式联系起来的一般公式，并对Q^{222}的例子进行了显式计算。这种瞬子的全息解释目前还不清楚。

英文摘要：

We study U(1) symmetries dual to Betti multiplets in the AdS_4/CFT_3 correspondence for M2 branes at Calabi-Yau four-fold singularities. Analysis of the boundary conditions for vector fields in AdS_4 allows for a choice where wrapped M5 brane states carrying non-zero charge under such symmetries can be considered. We begin by focusing on isolated toric singularities without vanishing six-cycles, and study in detail the cone over Q^{111}. The boundary conditions considered are dual to a CFT where the gauge group is U(1)^2 x SU(N)^4. We find agreement between the spectrum of gauge-invariant baryonic-type operators in this theory and wrapped M5 brane states. Moreover, the physics of vacua in which these symmetries are spontaneously broken precisely matches a dual gravity analysis involving resolutions of the singularity, where we are able to match condensates of the baryonic operators, Goldstone bosons and global strings. We also argue more generally that theories where the resolutions have six-cycles are expected to receive non-perturbative corrections from M5 brane instantons. We give a general formula relating the instanton action to normalizable harmonic two-forms, and compute it explicitly for the Q^{222} example. The holographic interpretation of such instantons is currently unclear.

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