Work

Can the universe experience an AdS landscape since matter-radiation equality?

Year: 2025

Type: article

Abstract: Though an anti--de Sitter (AdS) vacuum, corresponding to a negative cosmological constant (NCC), can be not responsible for the acceleration of the current Universe, it might coexist with one evolving positive dark energy component at low redshift, as well as with early dark energy around the recombination to solve the Hubble tension. In this paper, we investigate the scenario with one AdS vacuum around the recombination and one at low redshift, and from both current observational and theoretical perspectives preliminarily explore the possibility that the Universe experienced a landscape with multiple AdS vacua since matter-radiation equality.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/pgrx-w8rh

Authors: Hao Wang, Yun-Song Piao

Institutions: Chinese Academy of Sciences, University of Chinese Academy of Sciences, International Centre for Theoretical Physics Asia-Pacific, Institute of Theoretical Physics

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China, Fundamental Research Funds for the Central Universities

Awards: G4865750246, G6883445009, G8854505000