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Gravitational Particle Creation in a Stiff Matter Dominated Universe

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arxiv 1612.02586 v1 pith:L2WSQZ35 submitted 2016-12-08 gr-qc astro-ph.COhep-th

Juho Lankinen , Iiro Vilja This is my paper · ORCID
classification gr-qcastro-ph.COhep-th
keywords creationscalarfieldparticleuniversedominatedexpansiongravitational
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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 apply the results to cosmology and calculate an upper bound for the equilibrium temperature of the secondary particles created by the scalar field decay.

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Cited by 1 Pith paper

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  1. A note on the gravitational dark matter production

    gr-qc 2024-12 conditional novelty 4.0 of 10

    The study connects the reheating temperature to the dark matter mass in two gravitational production scenarios and derives narrow viable mass ranges for each.

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