On the semiclassical bounce with strong minimal assumptions
arxiv(2024)
摘要
We explore the possibility of avoiding cosmological singularity with a bounce
solution in the early Universe. The main finding is that simple and well-known
semiclassical correction, which describes the mixing of radiation and gravity
in the effective action, may provide an analytic solution with a bounce. The
solution requires a positive beta function for the total radiation term and the
contraction of the Universe at the initial instant. The numerical estimate
shows that the bounce may occur in an acceptable range of energies, but only
under strong assumptions about the particle physics beyond the Standard Model.
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