Riemannian approach and cosmological singularity
- 15 April 1984
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 29 (8) , 1609-1617
- https://doi.org/10.1103/physrevd.29.1609
Abstract
We study the definition of the Feynman propagator for a free conformally coupled scalar field on a Robertson-Walker background, as the continuation to physical space of the single propagator of a Riemannian manifold. If the space-time has a cosmological singularity, a boundary condition is proposed that leads to the definition of particle modes at the singularity.Keywords
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