Tuesday, May 15, 2012

1205.3138 (L. Clavelli et al.)

An Alternative String Landscape Cosmology: Eliminating Bizarreness    [PDF]

L. Clavelli, G. Goldstein
In what has become a standard eternal inflation picture of the string landscape there are many problematic consequences and a difficulty defining probabilities for the occurrence of each type of universe. One feature in particular that might be philosophically disconcerting is the infinite cloning of each individual and each civilization in infinite numbers of separated regions of the multiverse. Even if this is not ruled out due to causal separation one might ask whether the infinite cloning is a universal prediction of string landscape models or whether there are scenarios in which it is avoided. If a viable alternative cosmology can be constructed one might search for predictions that might allow one to discriminate experimentally between the models. We present one such scenario although, in doing so, we are forced to give up several popular presuppositions. We also consider the future lifetime of the current universe before becoming a light trapping region.
View original: http://arxiv.org/abs/1205.3138

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