A critical note on time in the multiverse
Abstract
In recent analyses of standard, single-universe, cosmology, it was pointed out that specific assumptions regarding the distribution and motion of matter must be made in order to set up the cosmological standard model with a global time parameter. Relying on these results, we critically examine the notion of time in the multiverse, and in particular the idea that some parts of the multiverse are older than others. By focusing on the most elaborated multiverse proposal in cosmology, the inflationary multiverse, we identify three problems for establishing a physically well-defined notion of global time; a quantum problem, a collision problem and a fractal problem. The quantum problem, and the closely related "cosmic measurement problem", may even undermine the idea that parts of the multiverse causally and temporally precede our universe.
Cite
@article{arxiv.1305.2055,
title = {A critical note on time in the multiverse},
author = {Svend E. Rugh and Henrik Zinkernagel},
journal= {arXiv preprint arXiv:1305.2055},
year = {2013}
}
Comments
To appear in D. Dieks and V. Karakostas (eds.) "Recent Progress in Philosophy of Science: Perspectives and Foundational Problems" The Third European Philosophy of Science Association Proceedings. Dordrecht: Springer