Gravitational particle creation in a stiff matter dominated universe
Journal Article
·
· Journal of Cosmology and Astroparticle Physics
- Turku Centre for Quantum Physics, Department of Physics and Astronomy, University of Turku, Turun Yliopisto 20014, Turku (Finland)
A scenario for gravitational particle creation in a stiff matter dominated flat Friedmann-Robertson-Walker universe is presented. The primary creation of scalar particles is calculated using quantum field theory in curved spacetime and it is found to be strongly dependent on the scalar mass and the expansion parameter of the universe. The particle creation is most effective for a very massive scalar field and large expansion parameter. We demonstrate the phenomenon by applying it to cosmological toy model scenario, where secondary particles are created by the scalar field decay.
- OSTI ID:
- 22676055
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 08; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
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