"Old" Locked Inflation

Details "Old" Locked Inflation "Old" Locked Inflation

2009-01-14

arxiv.org/abs/0901.2058v4

JCAP 0905:008,2009

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, 3 figures, references added

Scientific paper

10.1088/1475-7516/2009/05/008

In this paper, we revisit the idea of locked inflation, which does not require a potential satisfying the normal slow-roll condition, but suffers from the problems associated with "saddle inflation". We propose a scenario based on locked inflation, however, with an alternative evolution mechanism of the "waterfall field" $\phi$. Instead of rolling down along the potential, the $\phi$ field will tunnel to end the inflation stage like in old inflation, by which the saddle inflation could be avoided. Further, we study a cascade of old locked inflation, which can be motivated by the string landscape. Our model is based on the consideration of making locked inflation feasible so as to give a working model without slow roll; It also can be seen as an effort to embed the old inflation in string landscape.

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