We study time-dependent deformations of a certain class of backgrounds in type IIB supergravity. These backgrounds are solutions of a five-dimensional consistent truncation, relevant for gauge/gravity duality, which have the form of d S 4 foliations over a fifth (radial) direction. We investigate time-dependent deformations of those solutions in the search for gravitational duals of models of glueball inflation. A particular starting ansatz enables us to find a class of analytical solutions, corresponding to an ultra-slow roll inflationary regime. This regime may play a role in understanding the low l anomaly in the power spectrum of the CMB.
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机译:我们研究IIB型超重力作用中特定类别背景的时变。这些背景是与量规/重力对偶有关的五维一致截断的解决方案,其在第五(径向)方向上具有d S 4叶形式。我们在寻找胶球充气模型的引力对偶的过程中调查了这些解的时间依赖性变形。特定的起始ansatz使我们能够找到一类分析解决方案,对应于超慢滚动膨胀机制。这种机制可能有助于理解CMB功率谱中的低l异常。
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