The Phase Transition to Eternal Inflation

Details The Phase Transition to Eternal Inflation The Phase Transition to Eternal Inflation

2008-02-07

arxiv.org/abs/0802.1067v2

JHEP 0809:036,2008

Physics

High Energy Physics

High Energy Physics - Theory

48 pages, 8 figures. v2: JHEP published version, shortened title, added references

Scientific paper

10.1088/1126-6708/2008/09/036

For slow-roll inflation we study the phase transition to the eternal regime. Starting from a finite inflationary volume, we consider the volume of the universe at reheating as order parameter. We show that there exists a critical value for the classical inflaton speed, \dot\phi^2/H^4 = 3/(2 \pi^2), where the probability distribution for the reheating volume undergoes a sharp transition. In particular, for sub-critical inflaton speeds all distribution moments become infinite. We show that at the same transition point the system develops a non-vanishing probability of having a strictly infinite reheating volume, while retaining a finite probability for finite values. Our analysis represents the exact quantum treatment of the system at lowest order in the slow-roll parameters and H^2/M_Pl^2.

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