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arXiv 2004.14903hep-th
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Vasiliev高自旋引力中的边界条件和时空/纤维对偶

On boundary conditions and spacetime/fibre duality in Vasiliev's higher-spin gravity

Carlo Iazeolla

摘要:

本文讨论了Vasiliev系统的某些方面,首先回顾了最近提出的一种替代微扰方案:通过方便地选择同伦压缩算子来建立解,并通过微扰调整规范函数和积分常数来满足渐近反de Sitter边界条件。在线性水平上,后者是纤维元素,通过展开方程编码,传播任何自旋的无质量场。因此,线性化的解空间,以其时空性质(正则性和边界条件)为特征,在纤维中具有平行性。传统的分离的不同分支的线性化的解决方案,通过他们的时空功能进行审查,和他们的双纤维表征,以及相应的纤维元素到AdS irreps的安排,说明。这种结构首先审查的正规和奇异的解决方案,在紧凑的基础上,从而捕获无质量粒子和静态的高自旋黑洞,然后扩展到共形基础上的解决方案,捕获体到边界的传播和某些奇异的解决方案与消失的标度维数,有关的边界格林函数。两个基地之间的非幺正变换在其纤维代表的水平上被召回。

英文摘要:

This paper discusses some aspects of the Vasiliev system, beginning with a review of a recent proposal for an alternative perturbative scheme: solutions are built by means of a convenient choice of homotopy-contraction operator and subjected to asymptotically anti-de Sitter boundary conditions by perturbatively adjusting a gauge function and integration constants. At linear level the latter are fibre elements that encode, via unfolded equations, propagating massless fields of any spin. Therefore, linearized solution spaces, distinguished by their spacetime properties (regularity and boundary conditions), have parallels in the fibre. The traditional separation of different branches of linearized solutions via their spacetime features is reviewed, and their dual fibre characterization, as well as the arrangement of the corresponding fibre elements into AdS irreps, is illustrated. This construction is first reviewed for regular and singular solutions in compact basis, thereby capturing massless particles and static higher-spin black holes, and then extended to solutions in conformal basis, capturing bulk-to-boundary propagators and certain singular solutions with vanishing scaling dimension, related to boundary Green's functions. The non-unitary transformation between the two bases is recalled at the level of their fibre representatives.

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