论文标题
一无所有的气泡和广告不稳定性
Bubbles of nothing and AdS instabilities
论文作者
论文摘要
在此贡献中，我们回顾了文章Arxiv：2002.01764和Arxiv：2110.08276中介绍的思想和结果，其中ADS真空吸尘器的衰减成无需研究的气泡。首先，我们以宇宙常数和任意维度的一般相对论考虑ADS真空。在这种情况下，我们研究了一类引力intantons概括了Witten的泡沫，并讨论了欧几里得行动的推导。其次，我们考虑了一个“弦”的非苏匹马对称广告$ _4 $ _4 $真空，在$ s^6 $上的大规模IIA超级重新配置中产生，并保留G $ _2 $对称性。该真空已被证明具有完全稳定的KK频谱，并且还可以保护Brane-Jet衰变。在此框架中，我们讨论了连接到G $ _2 $ invariant真空的大量IIA中的气泡解决方案，并与不稳定通道相关联。最终，我们从没有D2电荷分布打扮的气泡的成核方面提供了这种不稳定性的解释。
In this contribution we review the ideas and results presented in the articles arXiv:2002.01764 and arXiv:2110.08276 where the decay of AdS vacua into bubbles of nothing is studied. We firstly consider AdS vacua in General Relativity with a cosmological constant and in arbitrary dimensions. In this context we study a class of gravitational instantons generalizing the Witten's bubble of nothing and we discuss the derivation of the euclidean action. Secondly we consider a "stringy" non-supersymmetric AdS$_4$ vacuum arising in a compactification of massive IIA supergravity on a $S^6$ and preserving G$_2$ symmetry. This vacuum has been shown to have a fully stable KK spectrum and also be protected against brane-jet decays. In this framework we discuss a bubble solution in massive IIA connected to the G$_2$-invariant vacuum and associated to an instability channel. We finally provide the interpretation of this instability in terms of the nucleation of a bubble of nothing dressed up with a D2 charge distribution.
