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Article Dans Une Revue Physical Review Letters Année : 2022

De Sitter bubbles from anti-de Sitter fluctuations

Résumé

Cosmological acceleration is difficult to accommodate in theories of fundamental interactions involving supergravity and superstrings. An alternative is that the acceleration is not universal but happens in a large localized region, which is possible in theories admitting regular black holes with de Sitter-like interiors. We point out that, given a global anti-de Sitter background, the formation of such 'de Sitter bubbles' will be enhanced by mechanisms analogous to the Bizon-Rostworowski instability in general relativity. This opens an arena for discussing the production of multiple accelerating universes from anti-de Sitter fluctuations. We demonstrate such collapse enhancement by explicit numerical work in the context of a simple two-dimensional dilaton-gravity model that mimics the spherically symmetric sector of higher-dimensional gravities.

Dates et versions

hal-03791938 , version 1 (29-09-2022)

Identifiants

Citer

Anxo Biasi, Oleg Evnin, Spyros Sypsas. De Sitter bubbles from anti-de Sitter fluctuations. Physical Review Letters, 2022, 129 (25), pp.251104. ⟨10.1103/PhysRevLett.129.251104⟩. ⟨hal-03791938⟩
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