Energy-momentum tensor in an expanding universe

Details Energy-momentum tensor in an expanding universe Energy-momentum tensor in an expanding universe

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..478..269h&link_type=abstract

Second international workshop on particle physics and the early universe (COSMO-98). AIP Conference Proceedings, Volume 478, pp

Physics

1

Quantum Field Theory In Curved Spacetime

Scientific paper

We study a quantum scalar field in a de Sitter universe. The initial state of the system is of adiabatic order four, and not necessarily de Sitter invariant. We define an adiabatic number basis in which the energy-momentum tensor has a quasi-classical form in terms of the number of particles present. Numerical results are presented for a massive field with ξ=1/6 (conformal coupling) and ξ=0 (minimal coupling).

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