TL;DR
This paper proposes a model where Hawking radiation from the cosmic apparent horizon influences the early universe, leading to a nonsingular origin from a de Sitter phase and avoiding the Big Bang singularity.
Contribution
It introduces a temperature-dependent scalar field model driven by Hawking radiation, providing a nonsingular universe scenario originating from a de Sitter phase.
Findings
Universe can originate from a de Sitter phase with Planck energy density.
Hawking radiation influences early universe dynamics.
Big Bang singularity is avoided in this model.
Abstract
In the background of Friedmann-Robertson-Walker Universe, there exists Hawking radiation which comes from the cosmic apparent horizon due to quantum effect. Although the Hawking radiation on the late time evolution of the universe could be safely neglected, it plays an important role in the very early stage of the universe. In view of this point, we identify the temperature in the scalar field potential with the Hawking temperature of cosmic apparent horizon. Then we find a nonsingular universe sourced by the temperature-dependant scalar field. We find that the universe could be created from a de Sitter phase which has the Planck energy density. Thus the Big-Bang singularity is avoided.
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