Strong tails in multifield inflation

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Abstract/Contents

Abstract: We investigate the tail of the distribution of cosmological perturbations in multifield inflation. We show that it can be quite generally parametrically non-Gaussian and heavy. This leads us to a new primordial black hole (PBH) production mechanism, that does not violate the current constraints from the CMB. We then study the connected N-point correlation functions of these theories and find that they have a general N!-enhancement. Finally, we present a new mechanism for inflation which exhibits a speed limit on scalar motion, generating accelerated expansion even on a steep potential, by explicitly integrating out the short modes of the additional fields coupled to the inflaton.

Type of resource	text
Form	electronic resource; remote; computer; online resource
Extent	1 online resource.
Place	California
Place	[Stanford, California]
Publisher	[Stanford University]
Copyright date	2021; ©2021
Publication date	2021; 2021
Issuance	monographic
Language	English

Author	Panagopoulos Alexandrou, Georgios Michail
Degree supervisor	Silverstein, Eva, 1970-
Thesis advisor	Silverstein, Eva, 1970-
Thesis advisor	Kallosh, Renata
Thesis advisor	Linde, A. D
Degree committee member	Kallosh, Renata
Degree committee member	Linde, A. D
Associated with	Stanford University, Department of Physics

Genre	Theses
Genre	Text

Statement of responsibility	Georgios Michail Panagopoulos Alexandrou.
Note	Submitted to the Department of Physics.
Thesis	Thesis Ph.D. Stanford University 2021.
Location	https://purl.stanford.edu/ts729tp9569

License: This work is licensed under a Creative Commons Attribution 3.0 Unported license (CC BY).

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