# Is de Sitter space always excluded in semiclassical f(R) gravity?

## TL;DR

This paper demonstrates that in semiclassical f(R) gravity, the corpuscular model generally rules out de Sitter space and phantom cosmic behaviors, impacting cosmological theories.

## Contribution

It shows that the corpuscular approach to gravity excludes de Sitter solutions and phantom phenomenology in semiclassical f(R) gravity, providing new constraints on cosmological models.

## Key findings

- De Sitter space is excluded in semiclassical f(R) gravity under the corpuscular model.
- Phantom-like cosmic behavior is naturally ruled out.
- The results impose new restrictions on semiclassical gravity theories.

## Abstract

It is shown that the recent corpuscular description of gravity generically excludes de Sitter spacetime in any semiclassical version of f(R) gravity. A phantom phenomenology of the cosmic dynamics is also naturally excluded.