Can the universe experience an AdS landscape since matter-radiation equality?
Hao Wang, Yun-Song Piao
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.
Topics & Concepts
PhysicsDark energyDe Sitter universeHubble's lawCosmological constantUniverseAccelerationVacuum energyComponent (thermodynamics)AstronomyTheoretical physicsCosmologyScale factor (cosmology)Current (fluid)Metric expansion of spaceEnergy (signal processing)Constant (computer programming)Cosmological modelCold dark matterAstrophysicsDark matterEkpyrotic universeConjunction (astronomy)Steady State theoryCosmology and Gravitation TheoriesGalaxies: Formation, Evolution, PhenomenaNoncommutative and Quantum Gravity Theories