Non-locality and late-time cosmic acceleration from an ultraviolet complete theory

Abstract

A local phenomenological model that reduces to a non-local gravitational theory giving dark energy is proposed. The non-local gravity action is known to fit the data as well as $\Lambda$-CDM thereby demanding a more fundamental local treatment. It is seen that the scale-invariant higher-derivative scalar-tensor theory of gravity, which is known to be ultraviolet perturbative renormalizable to all loops and where ghosts become innocuous, generates non-locality at low energies. The local action comprises of two real scalar fields coupled non-minimally with the higher-derivative gravity action. When one of the scalar acquiring the Vacuum Expectation Value (VEV) induces Einstein--Hilbert gravity, generates mass for fields, and gets decoupled from system, it leaves behind a residual theory which in turn leads to a non-local gravity generating dark energy effects.

1+9 pages. This manuscript belongs to an extension of the International Conference on Quantum Gravity 2018, Shenzhen, China

References in corpus (7)

• Cosmology and the Fate of Dilatation Symmetry
• Cosmological perturbations and structure formation in nonlocal infrared modifications of general relativity
• Non-Local Modification of Gravity and the Cosmological Constant Problem
• Non-local gravity and comparison with observational datasets
• Nonlinear structure formation in Nonlocal Gravity
• Naturalness and Dimensional Transmutation in Classically Scale-Invariant Gravity
• Ultraviolet complete dark energy model

Cited by in corpus (5)

• Metric for Rotating object in Infrared Corrected Nonlocal Gravity Model
• Non-locality effect on the entanglement entropy in deSitter
• Non-local scalar field on deSitter and its infrared behaviour
• RG studies of scalar-field models of long-range interactions
• Entanglement entropy of non-local theories in AdS