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Islands in the landscape
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The string theory landscape consists of many metastable de Sitter vacua, populated by eternal inflation. Tunneling between these vacua gives rise to a dynamical system, which asymptotically settles down to an equilibrium state. We investigate the effects of sinks to anti-de Sitter space, and show how their existence can change probabilities in the landscape. Sinks can disturb the thermal occupation numbers that would otherwise exist in the landscape and may cause regions that were previously in thermal contact to be divided into separate, thermally isolated islands.
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Eternal Inflation in Swampy Landscapes
Eternal inflation persists in landscapes where de Sitter vacua are rare or absent, via flyover transitions between isolated dS vacua or inflating bubble walls nucleated around saddle points.
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