无限地球上的危机：弦论景观中短暂的德西特拉
Crisis on Infinite Earths: Short-lived de Sitter Vacua in the String Theory Landscape
摘要：
我们在弦论中构造了纯非微扰的反德西特真空，它在提升到德西特（dS）真空时，具有比标准构造（如KKLT和LVS方案）小许多数量级的衰变时间。由于纯粹由非微扰项构成，这些真空避免了弦论中dS的其他构造所遇到的某些障碍。这导致在弦论中一类新的唯象dS真空，具有新颖的独特特征，如具有两个极大值。在研究了这些上升的dS真空是否服从TCC之后，我们重新讨论了dS空间作为真空实现的一些老问题。我们发现，它不仅是现象学上很难构建TCC兼容真空，但也固有的时间依赖性的自由度一般出现在这样的建设，除其他问题。这加强了这样一个观点，即如果dS存在于弦论中，它应该是一个Glauber-Sudarshan态，而不是真空。
英文摘要：
We construct purely non-perturbative anti-de Sitter vacua in string theory which, on uplifting to a de Sitter (dS) one, have a decay time many orders of magnitude smaller than those of standard constructions, such as the KKLT and LVS scenarios. By virtue of being constructed purely from non-perturbative terms, these vacua avoids certain obstructions plaguing other constructions of dS in string theory. This results in a new class of phenomenological dS vacua in string theory with novel distinctive characteristics such as having two maxima. After examining whether these uplifted dS vacua obey the TCC, we revisit some old problems of realization of dS space as a vacuum. We find that not only is it phenomenologically hard to construct TCC-compatible vacua, but also inherent temporal dependences of the degrees of freedom generically arise in such constructions, amongst other issues. This reinforces the idea that dS, if it exists in string theory, should be a Glauber-Sudarshan state and not a vacuum.
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