Connecting inflation with late cosmic acceleration by particle production

Understand

A continuous process of creation of particles is investigated as a possible connection between the inflationary stage with late cosmic acceleration.

• In this model, the inflationary era occurs due to a continuous and fast process of creation of relativistic particles, and the recent accelerating phase is driven by the non-relativistic matter creation from the gravitational field acting on the quantum vacuum, which finally results in an effective equation of state less than $-1$.
• Thus, explaining recent results in favor of a phantom dynamics without the need of any modifications in the gravity theory has been proposed.
• Finally, we confront the model with recent observational data of type Ia Supernova, history of the Hubble parameter, baryon acoustic oscillations, and the cosmic microwave background.