Making predictions in the multiverse
نویسندگان
چکیده
منابع مشابه
Making predictions in the multiverse
I describe reasons to think we are living in an eternally inflating multiverse where the observable “constants” of nature vary from place to place. The major obstacle to making predictions in this context is that we must regulate the infinities of eternal inflation. I review a number of proposed regulators, or measures. Recent work has ruled out a number of measures by showing that they conflic...
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The notion that there are many “universes” with different properties is one answer to the question of “why is the universe so hospitable to life?” This notion also naturally follows from current ideas in eternal inflation and string/M theory. But how do we test such a “multiverse” theory: which of the many universes do we compare to ours? This paper enumerates would would seem to be essential i...
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We compute trivariate probability distributions in the landscape, scanning simultaneously over the cosmological constant, the primordial density contrast, and spatial curvature. We consider two different measures for regulating the divergences of eternal inflation, and three different models for observers. In one model, observers are assumed to arise in proportion to the entropy produced by sta...
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Evidence for fine-tuning of physical parameters suitable for life can perhaps be explained by almost any combination of providence, coincidence or multiverse. A multiverse usually includes parts unobservable to us, but if the theory for it includes suitable measures for observations, what is observable can be explained in terms of the theory even if it contains such unobservable elements. Thus ...
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ژورنال
عنوان ژورنال: Classical and Quantum Gravity
سال: 2011
ISSN: 0264-9381,1361-6382
DOI: 10.1088/0264-9381/28/20/204007