High Energy Physics - Theory
[Submitted on 9 Nov 2021 (v1), last revised 4 May 2022 (this version, v3)]
Title:The quantum de Sitter root of quasi de Sitter observables: a pedagogical review
View PDFAbstract:In inflationary cosmology the quasi de Sitter graceful exit allows us to measure the quantum features of the primordial dS phase, in particular, the lack of scale invariance parametrized by the spectral index $n_s$. In this review we summarize previous work on how the underlying primordial scaling law is implemented in the dS quantum Fisher information of the dS planar ground state (dSQFI). At large scales the dSQFI unequivocally sets, without any qdS input, the value of $n_s$ to be $0.9672$. This value is independent of the tensor to scalar ratio whose value requires model dependent input. In addition the dSQFI predicts, at large scales, a small running compatible with the current experimental results. Other phenomenological consequences of the dSQFI for small scales, will be discussed in a future review.
Submission history
From: Raul Jimenez [view email][v1] Tue, 9 Nov 2021 19:45:29 UTC (831 KB)
[v2] Mon, 22 Nov 2021 13:17:45 UTC (831 KB)
[v3] Wed, 4 May 2022 08:59:38 UTC (828 KB)
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