Back-reaction of Quantum fields in an Einstein Universe

Details Back-reaction of Quantum fields in an Einstein Universe Back-reaction of Quantum fields in an Einstein Universe

2001-04-30

arxiv.org/abs/gr-qc/0104100v1

Phys.Rev. D65 (2002) 044028

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages, 2 figures

Scientific paper

10.1103/PhysRevD.65.044028

We study the back-reaction effects of the finite-temperature scalar field and the photon field in the background of an Einstein universe. In each case we find a relation between the temperature of the universe and its radius. These relations exhibit a minimum radius below which no self-consistent solution for the Einstein field equation can be found. A maximum temperature marks the transition from the vacuum dominated era to the radiation dominated era. An interpretation to this behavior in terms of Bose-Einstein condensation in the case of the scalar field is given.

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