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Astronomy and Cosmology
Cosmology
Exploring the BB Paradox in an Evolving Universe
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[QUOTE="windy miller, post: 5484752, member: 588149"] Thanks Simon, that helps a lot, but I still have some confusion. The BB problem is often phrased in terms of a thermal fluctuation from equilibrium but its also phrased in the context of eternal inflation. In this paper we see the following phrase: 'In an eternally inflating multiverse, the numbers of normal observers and Boltzmann brains produced over the course of eternal inflation are both infinite. They can be meaningfully compared only after one adopts some prescription to regulate the infinities". [URL]http://arxiv.org/pdf/0808.3778v3.pdf[/URL] That seems to be in conflict with what I hear from others like Sean Caroll that the BB must outnumber the normal observers in a stasitical fluctutaion. Although I note that elsewhere he has said the idea that BB outnumber the normals is a model dependant statement. They seem to be saying you can only take that statement after you introduce some measure, but normally we hear that's its inevitable and no mention of introducing a measure is given. So it seems that the two statements are inconsistent. Where am I going wrong? [/QUOTE]
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Astronomy and Cosmology
Cosmology
Exploring the BB Paradox in an Evolving Universe
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