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Gravitational particle creation in a stiff matter dominated universe
Tekijät: Lankinen J, Vilja I
Kustantaja: IOP PUBLISHING LTD
Kustannuspaikka: BRISTOL
Julkaisuvuosi: 2017
Journal: Journal of Cosmology and Astroparticle Physics
Tietokannassa oleva lehden nimi: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Lehden akronyymi: J COSMOL ASTROPART P
Artikkelin numero: ARTN 025
Numero: 8
Sivujen määrä: 12
ISSN: 1475-7516
eISSN: 1475-7516
DOI: https://doi.org/10.1088/1475-7516/2017/08/025
Verkko-osoite: 10.1088/1475-7516/2017/08/025
Tiivistelmä
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.
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.
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