Particle creation in the early Universe: achievements and problems

Abstract

Results on particle creation from vacuum by the gravitational field of the expanding Friedmann Universe are presented. Finite results for the density of particles and the energy density for created particles are given for different exact solutions for different regimes of the expansion of the Universe. The results are obtained as for conformal as for nonconformal particles. The hypothesis of the origination of visible matter from the decay of created from vacuum superheavy particles identified with the dark matter is discussed.

9 pages, 3 figures

References in corpus (5)

• Do active galactic nuclei convert dark matter into visible particles?
• Space-Time Description of Scalar Particle Creation by a Homogeneous Isotropic Gravitational Field
• Active Galactic Nuclei and Transformation of Dark Matter into Visible Matter
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Cited by in corpus (7)

• Gravitational particle production and the Hubble tension
• On the meaning of the wave function of the Universe
• Inclusive probability of particle creation on classical backgrounds
• Wave asymptotics at a cosmological time-singularity: classical and quantum scalar fields
• Rest frame vacua of massive Klein-Gordon fields on spatially flat FLRW spacetimes
• Vacuum quantum effects on Lie groups with bi-invariant metrics
• Ultraviolet asymptotics of particle creation with respect to a congruence of observers