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Open inflation in the string landscape

KMI Theory Seminar
2011-11-16 16:30
Prof.Misao Sasaki
KMI Science Symposia (ES635)

Open inflation is receiving renewed interest in the context of
string landscape. Since there are a large number of metastable
de Sitter vacua in the string landscape, tunneling from one
vacuum to another occurs frequently through the bubble
nucleation and open inflation is naturally realized. We argue
that though the universe appears to be very flat, a small
deviation of $Omega_{0}$ from unity can make the effect of
tensor-type perturbations on the large angle CMB anisotropy
significant. Thus we are already testing the string landscape
against observations.