发表机构
Universidad Autónoma de Madrid; Instituto de Física Teórica IFT-UAM/CSIC; CERN, Theoretical Physics Department（马德里自治大学; 理论物理研究所 UAM/CSIC; 欧洲核子研究中心，理论物理部）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该论文在M理论中通过Riemann平坦流形紧致化构建了首个四维自上而下的de Sitter极大值，具有特定真空能量和层级，并指出了寻找更高质量dS鞍点的方向。
AI 中文摘要
我们描述了一个完全显式的、四维的、自上而下的de Sitter鞍点，该鞍点通过将M理论紧致化在Riemann平坦流形$T^7/\mathbb{Z}_8$上构建。该解具有$5.02\cdot 10^{-10}\\,M_\text{Pl}^4$的真空能量，$m_{KK}/H\sim 10^{2}$的层级，并且相对于高圈和高阶导数修正处于可控状态。虽然该解是四维中自上而下dS极大值的首个例子，但它远非现象学上可行的。该解还为在Riemann平坦景观中寻找更高质量的dS鞍点提出了几个有前景的方向，我们对此进行了描述。
英文摘要
We describe a fully explicit, four-dimensional, top-down de Sitter saddle, constructed via compactification of M-theory on the Riemann-flat manifold $T^7/\mathbb{Z}_8$. The solution has a vacuum energy of $5.02\cdot 10^{-10}\,M_\text{Pl}^4$, a hierarchy $m_{KK}/H\sim 10^{2}$, and is under control with respect to higher-loop and higher-derivative corrections. While the solution is the first example of a top-down dS maximum in four dimensions, it is far from being phenomenologically viable. The solution also suggests several promising directions in the search for higher-quality dS saddles in the Riemann-flat Landscape, which we describe.
Comments26 pages, 1 figure, 4 tables
