Dynamics driven by the Trace Anomaly in FLRW Universes

Details Dynamics driven by the Trace Anomaly in FLRW Universes Dynamics driven by the Trace Anomaly in FLRW Universes

2009-11-16

arxiv.org/abs/0911.2997v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Conference proceedings of the "Invisible Universe Conference" in Paris (2009)

Scientific paper

By means of a semiclassical analysis we show that the trace anomaly does not affect the cosmological constant. We calculate the evolution of the Hubble parameter in quasi de Sitter spacetime, where the Hubble parameter varies slowly in time, and in FLRW spacetimes. We show dynamically that a Universe consisting of matter with a constant equation of state, a cosmological constant and the quantum trace anomaly evolves either to the classical de Sitter attractor or to a quantum trace anomaly driven one. There is no dynamical effect that influences the effective value of the cosmological constant.

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