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arXiv:1507.00727hep-th

A Cyclic Universe Approach to Fine Tuning

Stephon Alexander, Sam Cormack, Marcelo Gleiser

Early discovery. Linked by one identifiable commenter. This paper is outside the main ranking; a mention is not an endorsement.

Abstract

We present a closed bouncing universe model where the value of coupling constants is set by the dynamics of a ghost-like dilatonic scalar field. We show that adding a periodic potential for the scalar field leads to a cyclic Friedmann universe where the values of the couplings vary randomly from one cycle to the next. While the shuffling of values for the couplings happens during the bounce, within each cycle their time-dependence remains safely within present observational bounds for physically-motivated values of the model parameters. Our model presents an alternative to solutions of the fine tuning problem based on string landscape scenarios.

arXiv comments
5 pages, 2 figures
Journal reference
Phys. Lett. B, 757 (2016), 247
DOI
doi:10.1016/j.physletb.2016.03.082
Subjects
hep-thHigh Energy Physics, Theory gr-qcGeneral Relativity and Quantum Cosmology

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  1. The Link Between Jazz and Physics 1 comment

    • I followed all the links in this article and watched Alexander's TEDx talk. The only "link" I could find is a rather loose one, mentioned at the end of the TEDx talk[1]. A cyclic ('big bounce') cosmology is proposed as a solution to the fine-tuning problem, and this is likened…

      beefmanView on HNParent context

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