A Model of nonsingular universe

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.

Note:

6 pages, 3 figures. To appear in Entropy

98.80.Cq
98.65.Dx
radiation: Hawking
field theory: scalar
temperature: Hawking
big bang: singularity
energy: density
effect: quantum
horizon
background

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Figures(3)

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