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A multiverse outside of the swampland

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

A multiverse outside of the swampland

Abstract

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. Published by the American Physical Society 2024

Countries
France, France, United States, France, Italy, France
Keywords

High Energy Physics - Theory, cosmological constant, Cosmology and Nongalactic Astrophysics (astro-ph.CO), electroweak interaction, [PHYS.GRQC] Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), landscape, 530, General Relativity and Quantum Cosmology, scale, [PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], multiverse, High Energy Physics - Phenomenology, tunneling, High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Theory (hep-th), de Sitter, [PHYS.HTHE] Physics [physics]/High Energy Physics - Theory [hep-th], Cosmological constant; Hierarchy problem; Inflation; Naturalness, inflation, [PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green
hybrid