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Effects of field interactions upon particle creation in Robertson-Walker universesParticle creation due to field interactions in an expanding Robertson-Walker universe is investigated. A model in which pseudoscalar mesons and photons are created as a result of their mutual interaction is considered, and the energy density of created particles is calculated in model universes which undergo a bounce at some maximum curvature. The free-field creation of non-conformally coupled scalar particles and of gravitons is calculated in the same space-times. It is found that if the bounce occurs at a sufficiently early time the interacting particle creation will dominate. This result may be traced to the fact that the model interaction chosen introduces a length scale which is much larger than the Planck length.
Document ID
19800041097
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Birrell, N. D.
(Kings Coll. London, United Kingdom)
Davies, P. C. W.
(Kings Coll. London, United Kingdom)
Ford, L. H.
(King's College London, United Kingdom)
Date Acquired
August 10, 2013
Publication Date
March 1, 1980
Publication Information
Publication: Journal of Physics A - Mathematical and General
Volume: 13
Subject Category
Physics (General)
Accession Number
80A25267
Funding Number(s)
CONTRACT_GRANT: E(11-1)-3070
CONTRACT_GRANT: NSG-1323
Distribution Limits
Public
Copyright
Other

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