Phys. Rev. Lett. 98, 131301 (2007) [4 pages]Measures on Transitions for Cosmology from Eternal InflationReceived 3 January 2007; published 30 March 2007 We argue that, in the context of eternal inflation in the landscape, making predictions for cosmological—and possibly particle physics—observables requires a measure on the possible cosmological histories as opposed to one on the vacua themselves. If significant slow-roll inflation occurs, the observables are generally determined by the history after the last transition between metastable vacua. Hence, we start from several existing measures for counting vacua and develop measures for counting the transitions between vacua. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.131301
DOI:
10.1103/PhysRevLett.98.131301
PACS:
98.80.Cq, 98.80.Bp, 98.80.Qc
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