A number of Swampland conjectures and in particular the Trans‐Planckian Censorship Conjecture (TCC) suggest that de Sitter space is highly unstable if it exists at all. In this paper we construct effective theories of scalars rolling on potentials which are dual to a chain of short‐lived dS spaces decaying from one to the next through a cascade of non‐perturbative nucleation of bubbles. We find constraints on the effective potential resulting from various swampland criteria, including TCC, Weak Gravity Conjecture and Distance Conjecture. Surprisingly we find that TCC essentially incorporates all the other ones, and leads to a subclass of possible dual effective potentials. These results marginally rule out emergence of eternal inflation in the dual effective theory. We discuss some cosmological implications of our observations.

中文翻译：

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de Sitter Bubbles和沼泽地

许多Swampland猜想，尤其是Trans-Planckian Censorship猜想（TCC）表明，如果存在的话，de Sitter空间高度不稳定。在本文中，我们构建了有效的标量理论，其标量是通过一系列非扰动的气泡成核对短寿命dS空间链从一个到另一个衰减的链的双重对。我们发现各种沼泽标准（包括TCC，弱重力推测和距离推测）对有效潜力的制约。出乎意料的是，我们发现，TCC本质上并入了其他所有元素，并导致了可能的双重有效潜力的子类。这些结果略微排除了双重有效理论中永恒通货膨胀的出现。我们讨论了我们观测的一些宇宙学意义。