Robertson-Walker cosmologies with a trace anomaly effect in their dynamical description

Details Robertson-Walker cosmologies with a trace anomaly effect in their dynamical description Robertson-Walker cosmologies with a trace anomaly effect in their dynamical description

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..90...75w&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 90, no. 1, Feb. 1983, p. 75-78.

Physics

Cosmology, Electromagnetic Fields, Field Theory (Physics), Quantum Theory, Space-Time Functions, Anomalies, Minkowski Space, Radiant Flux Density, Radiation Pressure, Relativity, Vacuum

Scientific paper

The evolution of some vacuum spatially flat Robertson-Walker universes filled with a massless conformally invariant quantum field is presented in the energy density-curvature phase plane. The complete phase portrait on the plane e-R, where e and R are energy-density and curvature-scalar, respectively, are presented in order to show that the influence of quantum processes leads to qualitatively new cosmological solutions. The model differs from the 'classic' Friedmannian cosmology in that the dependence of pressure on the scalar curvature introduces new degrees of freedom, and that violations of the energy conditions become a common effect and lead to complicated phase structures.

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