Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984cqgra...1..167s&link_type=abstract
Classical and Quantum Gravity (ISSN 0264-9381), vol. 1, March 11, 1984, p. 167-177.
Astronomy and Astrophysics
Astronomy
3
Big Bang Cosmology, Einstein Equations, Gravitation Theory, Quantum Theory, Space-Time Functions, Anomalies, Astronomical Models, Energy Distribution, Perturbation Theory, Relativity, Scalars, Stress Tensors
Scientific paper
According to recent discoveries, the large-scale universe is highly isotropic and homogeneous. It is pointed out that the Friedman model with a homogeneous and isotropic Robertson-Walker metric provides the best description of the present universe. It is considered to be the main drawback of the model that it assumes a perfectly symmetric state from the beginning. The present investigation is concerned with a possible approach to the problem of making an initially inhomogeneous metric homogeneous. In the inhomogeneous conformally flat and spherically symmetric metric with the Bondi-type energy-momentum tensor, an additional quantum source is considered. Trace anomaly analysis for the massless scalar field makes it possible to calculate the vacuum expectation of the energy tensor for that field.
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