Inflation and Primordial Black Holes

被引：72
作者：
Ozsoy, Ogan [1 ,2 ]
Tasinato, Gianmassimo [3 ,4 ]
机构：
[1] Czech Acad Sci, Inst Phys, CEICO, Na Slovance 1999-2, Prague 18221, Czech Republic
[2] CSIC, Inst Fis Teor UAM, Calle Nicolas Cabrera 13-15, Madrid 28049, Spain
[3] Univ Bologna, Dipartimento Fis & Astron, Via Irnerio 46, I-40129 Bologna, Italy
[4] Swansea Univ, Dept Phys, Swansea SA2 8PP, Wales
来源：
UNIVERSE | 2023年 / 9卷 / 05期
关键词：
inflation; primordial black holes; dark matter; early universe; GRAVITATIONAL COLLAPSE; DENSITY PERTURBATIONS; MAGELLANIC CLOUDS; CP CONSERVATION; DARK-MATTER; OGLE VIEW; UNIVERSE; FIELD; CONSTRAINTS; OBJECTS;
D O I：
10.3390/universe9050203
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We review conceptual aspects of inflationary scenarios able to produce primordial black holes by amplifying the size of curvature fluctuations to the level required to trigger black hole formation. We identify general mechanisms to do so, both for single- and multiple-field inflation. In single-field inflation, the spectrum of curvature fluctuations is enhanced by pronounced gradients of background quantities controlling the cosmological dynamics, which can induce brief phases of non-slow-roll inflationary evolution. In multiple-field inflation, the amplification occurs through appropriate couplings with additional sectors characterized by tachyonic instabilities that enhance the size of their fluctuations. As representative examples, we consider axion inflation and two-field models of inflation with rapid turns in field space. We develop our discussion in a pedagogical manner by including some of the most relevant calculations and by guiding the reader through the existing theoretical literature, emphasizing general themes common to several models.
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页数：78
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