Introduction to the Number of e-Folds in Slow-Roll Inflation

被引：2

作者：

Di Marco, Alessandro ^{[1
,2
]}

Orazi, Emanuele ^{[3
,4
]}

Pradisi, Gianfranco ^{[2
,5
]}

机构：

[1] Ist Astrofis & Planetol Spaziali INAF IAPS, Ist Nazl Astrofis, Via Fosso Cavaliere 100, I-00133 Rome, Italy

[2] Ist Nazl Fis Nucleare INFN, Sez Roma Tor Vergata, Via Ric Sci 1, I-00133 Rome, Italy

[3] Univ Fed Rio Grande do Norte, Escola Ciencia, Campus Univ, BR-59078970 Lagoa Nova, RN, Brazil

[4] Univ Fed Rio Grande do Norte, Int Inst Phys, Campus Univ, BR-59078970 Lagoa Nova, RN, Brazil

[5] Univ Roma Tor Vergata, Dipartimento Fis, Via Ric Sci 1, I-00133 Rome, Italy

来源：

UNIVERSE | 2024年 / 10卷 / 07期

关键词：

cosmology; early universe cosmology; inflation; number of e-folds; SCALAR FIELD-DYNAMICS; CHAOTIC INFLATION; DENSITY PERTURBATIONS; GRAVITATIONAL-WAVES; PARTICLE-PRODUCTION; INITIAL CONDITIONS; QUANTUM FLUCTUATIONS; TENSOR PERTURBATIONS; COSMOLOGICAL MODELS; UNIVERSE SCENARIO;

D O I：

10.3390/universe10070284

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this review, a pedagogical introduction to the concepts of slow-roll inflationary universe and number of e-folds is provided. In particular, the differences between the basic notion of number of e-folds (N-e), total number of e-folds (N-T) and number of e-folds before the end of inflation (N) are outlined. The proper application of the number of e-folds before the end of inflation is discussed both as a time-like variable for the scalar field evolution and as a key parameter for computing inflationary predictions.

引用

页数：24

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