Green’s function for the scalar field in the early Universe
- 15 August 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 36 (4) , 1259-1262
- https://doi.org/10.1103/physrevd.36.1259
Abstract
We derive the thermal Green’s function for the scalar field in a de Sitter space-time and apply it to the problem of the early Universe. Field fluctuations relevant for inflation arise predominantly from wavelengths of the order of the inverse Hubble constant. Sufficient inflation is obtained in a Coleman-Weinberg model, provided the coupling constant is small enough. The results are insensitive to the choice of the vacuum of the field theory.Keywords
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