A Model of Nonsingular Universe

Entropy

关键词: Hawking temperature;    scalar field;    nonsingular universe;   

DOI  :  10.3390/e14071296

来源: mdpi

【 摘 要 】

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-dependent 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.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.