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arxiv: hep-th/0605015 · v1 · submitted 2006-05-01 · ✦ hep-th · astro-ph· gr-qc

Eternal observers and bubble abundances in the landscape

classification ✦ hep-th astro-phgr-qc
keywords bubblesvacuabubblelandscapemodelsobserverabundanceabundances
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We study a class of ``landscape'' models in which all vacua have positive energy density, so that inflation never ends and bubbles of different vacua are endlessly ``recycled''. In such models, each geodesic observer passes through an infinite sequence of bubbles, visiting all possible kinds of vacua. The bubble abundance $p_j$ can then be defined as the frequency at which bubbles of type $j$ are visited along the worldline of an observer. We compare this definition with the recently proposed general prescription for $p_j$ and show that they give identical results.

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