Trans-Planckian censorship constraints on properties and cosmological applications of axion-like fields

被引：2

作者：

Shlivko, David ^{[1
]}

机构：

[1] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

来源：

PHYSICS LETTERS B | 2023年 / 846卷

关键词：

Axion; Swampland; Inflation; Dark energy; NATURAL INFLATION;

D O I：

10.1016/j.physletb.2023.138251

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use the Trans-Planckian Censorship Conjecture (TCC) to constrain the decay constants f characterizing a set of N identical axion-like fields with cosine potentials, improving upon the precision of other Swampland conjectures and existing string-theoretic arguments. We find that consistency with the TCC root requires any such set of axion-like fields to satisfy f N root less than or similar to 0.6M(pl), where M(pl )is the reduced Planck mass. We show that this bound makes models of axion-driven inflation incapable of simultaneously producing the required number of e-foldings and the observed scalar spectral tilt. In contrast, we find that models of axion quintessence can be simultaneously compatible with the TCC and observational data, provided that the axions' initial field values are set near the maxima of their potentials to within roughly +/- (pi)/(5 )f.

引用

页数：7

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