A multiverse outside of the swampland

D’Agnolo, Raffaele Tito; Mangini, Paolo; Rigo, Gabriele; Wang, Lian-Tao

doi:10.1103/physrevd.110.055007

Title: A multiverse outside of the swampland

Journal Article · 02 September 2024 · Physical Review. D.

DOI: https://doi.org/10.1103/physrevd.110.055007 · OSTI ID:2439486

^[1]; Mangini, Paolo ^[2];

^[3]; Wang, Lian-Tao ^[4]

Université Paris-Saclay, Gif-sur-Yvette (France); Université Paris Cité (France)
Sapienza Università di Roma (Italy)
Université Paris-Saclay, Gif-sur-Yvette (France)
University of Chicago, IL (United States)

A multiverse can arise from landscapes without de Sitter minima. It can be populated during a period of eternal inflation without trans-Planckian field excursions and without flat potentials. This multiverse can explain the values of the cosmological constant and of the weak scale. In the process of proving these statements, we derive a few simple, but counterintuitive results. We show that it is easy to write models of eternal inflation compatible with the distance and refined de Sitter conjectures. Secondly, tunneling transitions that move fields from a lower-energy vacuum to a higher-energy vacuum and generate baby universes are possible, and occur during eternal inflation. Finally, we relax the assumption of no de Sitter minima and show that this more standard multiverse can be populated by Coleman-de Luccia transitions in about 100 e-folds of inflation.

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Research Organization:: University of Chicago, IL (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: SC0009924; SC0013642

OSTI ID:: 2439486

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 5 Vol. 110; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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