INVESTIGADORES
CALZETTA Esteban Adolfo
artículos
Título:
Riemannian approach and cosmological singularity
Autor/es:
MARIO CASTAGNINO; ESTEBAN CALZETTA
Revista:
PHYSICAL REVIEW D - PARTICLE AND FILDS
Editorial:
APS
Referencias:
Año: 1984 vol. 29 p. 1609 - 1617
ISSN:
0556-2821
Resumen:
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.
