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arXiv 0704.3442hep-th
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M理论中的1/2- BPS态和对偶CFTs中的缺陷

1/2-BPS states in M theory and defects in the dual CFTs

Oleg Lunin

摘要:

我们研究了AdS_7 × S^4和AdS_4 × S^7中的超对称膜。我们表明,在前一种情况下的膜应被视为M5膜通量,我们确定了两种类型的这样的fivebranes(它们类似于巨引力子和对偶巨星)。在AdS_4 x S^7中,我们发现了具有通量的M5膜和独立的膜堆。我们还超越了探测近似,并构造了描述膜产生的几何形状的正则超引力解。度量是完全指定的一个函数,满足拉普拉斯或户田方程,我们给出了一个完整的分类边界条件导致光滑的几何形状。本文讨论的膜组态是三维和六维共形场论中各种缺陷的对偶。

英文摘要:

We study supersymmetric branes in AdS_7 x S^4 and AdS_4 x S^7. We show that in the former case the membranes should be viewed as M5 branes with fluxes and we identify two types of such fivebranes (they are analogous to giant gravitons and to dual giants). In AdS_4 x S^7 we find both M5 branes with fluxes and freestanding stacks of membranes. We also go beyond probe approximation and construct regular supergravity solutions describing geometries produced by the branes. The metrics are completely specified by one function which satisfies either Laplace or Toda equation and we give a complete classification of boundary conditions leading to smooth geometries. The brane configurations discussed in this paper are dual to various defects in three- and six-dimensional conformal field theories.

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