Why Does Inflation Look Single Field to Us?

Tokeshi, Koki; Vennin, Vincent

Tokeshi, Koki; Vennin, Vincent.

Afiliación

Tokeshi K; Department of Physics and Research Center for the Early Universe (RESCEU), Graduate School of Science, <a href="https://ror.org/057zh3y96">The University of Tokyo</a>, Bunkyo, Tokyo 113-0033, Japan.
Vennin V; <a href="https://ror.org/03a26mh11">Laboratoire de Physique de l'École Normale Supérieure</a>, <a href="https://ror.org/05a0dhs15">ENS</a>, CNRS, Université PSL, <a href="https://ror.org/02en5vm52">Sorbonne Université</a>, Université Paris Cité, 75005 Paris, France.

Phys Rev Lett ; 132(25): 251001, 2024 Jun 21.

Article en En | MEDLINE | ID: mdl-38996242

ABSTRACT

ABSTRACT

Most high-energy constructions that realize a phase of cosmic inflation contain many degrees of freedom. Yet, cosmological observations are all consistent with single-field embeddings. We show how volume selection effects explain this apparent paradox. Because of quantum diffusion, different regions of space inflate by different amounts. In regions that inflate most, and eventually dominate the volume of the Universe, a generic mechanism is unveiled that diverts the inflationary dynamics towards single-field attractors. The formalism of constrained stochastic inflation is developed to this end.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2024 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos

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