论文标题
哦，等等，O8 De Sitter可能不稳定！
Oh, wait, O8 de Sitter may be unstable!
论文作者
论文摘要
我们分析了在两个O8源存在下通过压实大规模IIA超重力构建的四维de Sitter真空吸尘器的稳定性[1]。当嵌入字符串理论中时，第一个源将清晰的解释为O8 $ _- $平面，但是第二个来源可以对应于O8 $ _+$平面或O8 $ _- $ _- $ _- $ _- $ _- $ _- $平面，顶部为16 d8-branes。我们发现后一种解决方案具有速度不稳定性，对应于D8-branes从O8 $ _-$平面移开。我们评论区分这些来源的可能方法。
We analyze the stability of four-dimensional de Sitter vacua constructed by compactifying massive Type IIA supergravity in the presence of two O8 sources [1]. When embedded in String Theory the first source has a clear interpretation as an O8$_-$ plane, but the second one could correspond to either an O8$_+$ plane or to an O8$_-$ plane with 16 D8-branes on top. We find that this latter solution has a tachyonic instability, corresponding to the D8-branes moving away from the O8$_-$ plane. We comment on the possible ways of distinguishing between these sources.
