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.
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页数：24
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