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We construct purely non-perturbative anti-de Sitter vacua in string theorywhich, on uplifting to a de Sitter (dS) one, have a decay time many orders ofmagnitude smaller than those of standard constructions, such as the KKLT andLVS scenarios. By virtue of being constructed purely from non-perturbativeterms, these vacua avoids certain obstructions plaguing other constructions ofdS in string theory. This results in a new class of phenomenological dS vacuain string theory with novel distinctive characteristics such as having twomaxima. After examining whether these uplifted dS vacua obey the TCC, werevisit some old problems of realization of dS space as a vacuum. We find thatnot only is it phenomenologically hard to construct TCC-compatible vacua, butalso inherent temporal dependences of the degrees of freedom generically arisein 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 avacuum.

Crisis on Infinite Earths: Short-lived de Sitter Vacua in the String Theory Landscape