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• W4366990422 endingPage "203" @default.
• W4366990422 startingPage "203" @default.
• W4366990422 abstract "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." @default.
• W4366990422 created "2023-04-27" @default.
• W4366990422 creator A5024926912 @default.
• W4366990422 creator A5061171337 @default.
• W4366990422 date "2023-04-24" @default.
• W4366990422 modified "2023-10-14" @default.
• W4366990422 title "Inflation and Primordial Black Holes" @default.
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