Dynamic Dark Energy from the Local Limit of Nonlocal Gravity

Abstract

Nonlocal gravity (NLG), a classical extension of Einstein's theory of gravitation, has been studied mainly in linearized form. In particular, nonlinearities have thus far prevented the treatment of cosmological models in NLG. In this essay, we discuss the local limit of NLG and apply this limit to the expanding homogenous and isotropic universe. The theory only allows spatially flat cosmological models; furthermore, de Sitter spacetime is forbidden. The components of the model will have different dynamics with respect to cosmic time as compared to the standard $\Lambda$CDM model; specifically, instead of the cosmological constant, the modified flat model of cosmology involves a dynamic dark energy component in order to account for the accelerated phase of the expansion of the universe.

Honorable Mention in the Gravity Research Foundation 2023 Awards for Essays on Gravitation

References in corpus (5)

• The Confrontation between General Relativity and Experiment
• Nonlocal Gravity Simulates Dark Matter
• A formal framework for a nonlocal generalization of Einstein's theory of gravitation
• Constitutive law of nonlocal gravity
• Dynamical Friction in Nonlocal Gravity

Cited by in corpus (6)

• Anisotropic Cosmology in the Local Limit of Nonlocal Gravity
• Local Limit of Nonlocal Gravity: Cosmological Perturbations
• Local Limit of Nonlocal Gravity: A Teleparallel Extension of General Relativity
• One-point Statistics in various cosmic environments in the presence of massive neutrinos
• Dwarf galaxies in non-local gravity
• Gödel's Universe and the Local Limit of Nonlocal Gravity