Preheating a bouncing universe

Understand

Preheating describes the stage of rapidly depositing the energy of cosmological scalar field into excitations of other light fields.

• This stage is characterized by exponential particle production due to the parametric resonance.
• We study this process in the frame of matter bounce cosmology.
• Our results show that the preheating process in bouncing cosmology is even more efficient than that in inflationary cosmology.