Scalar fields on a Robertson-Walker background

We study the propagator of a massless minimally coupled scalar field in a power-law Robertson-Walker background. In the case where the energy-momentum density responsible for the formation of the background is provided by the scalar itself we find that the propagator shows no sign of singular infrar...

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Bibliographic Details
Published in:Physics letters. B 1991-01, Vol.255 (1), p.27-30
Main Authors: Iliopoulos, J., Tomaras, T.N.
Format: Article
Language:English
Subjects:
Classical and quantum physics: mechanics and fields
Exact sciences and technology
Physics
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Summary:We study the propagator of a massless minimally coupled scalar field in a power-law Robertson-Walker background. In the case where the energy-momentum density responsible for the formation of the background is provided by the scalar itself we find that the propagator shows no sign of singular infrared behavior for all values of the expansion parameter.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(91)91134-H