Mathematics
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ap%26ss.215..229c&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 215, no. 2, p. 229-236
Mathematics
1
Constants, Cosmology, Einstein Equations, Field Theory (Physics), Gravitation Theory, Quantum Theory, Universe, Curvature, Flux Density, Ideal Fluids, Singularity (Mathematics), Stability
Scientific paper
Exact solutions of the semi-classical Eistein equations with cosmological constant for conformally invariant free quantum fields in a general Robertson-Walker metric are found when a classical perfect fluid is present. There exist a one-parameter family of time-symmetric bouncing solutions that avoid the singularity and a one-parameter family which does not have particles horizons. The de Sitter solution is found to be stable, while the Einstein universe is unstable.
Chimento Luis P.
Zuccala Norberto A.
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