Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2000-01-12
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
LaTeX, 8 pages, 2 figure, Presented at 9th Workshop on General Relativity and Gravitation, Hiroshima, Japan, Nov 3-6, 1999, Fo
Scientific paper
It appears difficult to construct a simple model for an open universe based on the one bubble inflationary scenario. The reason is that one needs a large mass to avoid the tunneling via the Hawking Moss solution and a small mass for successful slow-rolling. However, Rubakov and Sibiryakov suggest that the Hawking Moss solution is not a solution for the false vacuum decay process since it does not satisfy the boundary condition. Hence, we have reconsidered the arguments for the defect of the simple polynomial model. We find the valley bounce belonging to a valley line in the functional space represents the decay process instead of the Hawking Moss solution. The point is that the valley bounce gives the appropriate initial condition for the inflation. We show an open inflation model can be constructed within the polynomial form of the potential so that the fluctuations can be reconciled with the observations.
Koyama Kazuya
Maeda Kayoko
Soda Jiro
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