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Title: Gravitational particle creation in a stiff matter dominated universe

Abstract

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.

Authors:
;  [1]
  1. Turku Centre for Quantum Physics, Department of Physics and Astronomy, University of Turku, Turun Yliopisto 20014, Turku (Finland)
Publication Date:
OSTI Identifier:
22676055
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2017; Journal Issue: 08; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COMPUTERIZED SIMULATION; COSMOLOGICAL MODELS; DECAY; EXPANSION; GRAVITATION; MASS; QUANTUM FIELD THEORY; SCALAR FIELDS; SPACE-TIME; UNIVERSE

Citation Formats

Lankinen, Juho, and Vilja, Iiro. Gravitational particle creation in a stiff matter dominated universe. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/08/025.
Lankinen, Juho, & Vilja, Iiro. Gravitational particle creation in a stiff matter dominated universe. United States. https://doi.org/10.1088/1475-7516/2017/08/025
Lankinen, Juho, and Vilja, Iiro. Tue . "Gravitational particle creation in a stiff matter dominated universe". United States. https://doi.org/10.1088/1475-7516/2017/08/025.
@article{osti_22676055,
title = {Gravitational particle creation in a stiff matter dominated universe},
author = {Lankinen, Juho and Vilja, Iiro},
abstractNote = {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.},
doi = {10.1088/1475-7516/2017/08/025},
url = {https://www.osti.gov/biblio/22676055}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 08,
volume = 2017,
place = {United States},
year = {2017},
month = {8}
}