Can nonlocal gravity really explain dark energy?

Salvatore Capozziello*, Anupam Mazumdar, Giuseppe Meluccio

*Corresponding author voor dit werk

OnderzoeksoutputAcademicpeer review

12 Downloads (Pure)

Samenvatting

In view to scrutinize the idea that nonlocal modifications of General Relativity could dynamically address the dark energy problem, we investigate the evolution of the Universe at infrared scales as an Infinite Derivative Gravity model of the Ricci scalar, without introducing the cosmological constant Λ or any scalar field. The accelerated expansion of the late Universe is shown to be compatible with the emergence of nonlocal gravitational effects at sufficiently low energies. A technique for circumventing the mathematical complexity of the nonlocal cosmological equations is developed and, after drawing a connection with the Starobinsky gravity, verifiable predictions are considered, like a possible decreasing in the strength of the effective gravitational constant. In conclusion, the emergence of nonlocal gravity corrections at given scales could be an efficient mechanism to address the dark energy problem.

Originele taal-2English
Artikelnummer101517
Aantal pagina's12
TijdschriftPhysics of the Dark Universe
Volume45
Vroegere onlinedatum12-mei-2024
DOI's
StatusPublished - jul.-2024

Vingerafdruk

Duik in de onderzoeksthema's van 'Can nonlocal gravity really explain dark energy?'. Samen vormen ze een unieke vingerafdruk.

Citeer dit