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    Thermal spectra in the early Universe


    Dolan, Brian P. (1991) Thermal spectra in the early Universe. Classical and Quantum Gravity, 8 (11). pp. 1955-1960. ISSN 0264-9381

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    Abstract

    It is shown that curvature effects, though completely negligible at the present day, can drastically alter thermal spectra at early times in some inflationary cosmological models. This can lead to a modification of the thermal history of the universe before the entropy production. The effects are only present for spatially curved k not=0 Robertson-Walker models, not for spatially flat k=0 models. If the entropy increase is >> 1087 and k not=0 then the energy density in the quantum fields is much greater, and hence the universe is much younger, at the onset of inflation than would be the case in a spatially flat universe. The effect is not relevant for chaotic inflation.

    Item Type: Article
    Additional Information: Cite as: B P Dolan 1991 Class. Quantum Grav. 8 1955
    Keywords: Thermal spectra; early Universe;
    Academic Unit: Faculty of Science and Engineering > Mathematical Physics
    Item ID: 10516
    Identification Number: https://doi.org/10.1088/0264-9381/8/11/008
    Depositing User: Dr. Brian Dolan
    Date Deposited: 20 Feb 2019 14:30
    Journal or Publication Title: Classical and Quantum Gravity
    Publisher: Institute of Physics
    Refereed: Yes
    URI:

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