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Designing Cyclic Universe Models

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arxiv hep-th/0307132 v4 pith:TZCPZP4M submitted 2003-07-15 hep-th astro-phhep-ph

Justin Khoury , Paul J. Steinhardt , Neil Turok This is my paper · ORCID
classification hep-thastro-phhep-ph
keywords modelscyclicconstraintsparametersuniverseadvancesanalogousbang
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Recent advances in understanding the propagation of perturbations through the transition from big crunch to big bang (esp. Tolley et al. hep-th/0306109) make it possible for the first time to consider the full set of phenomenological constraints on the scalar field potential in cyclic models of the universe. We show that cyclic models require a comparable degree of tuning to that needed for inflationary models. The constraints are reduced to a set of simple design rules including "fast-roll" parameters analogous to the "slow-roll" parameters in inflation.

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Cited by 1 Pith paper

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  1. Dark Matter Ultraviolet Freeze-in in General Reheating Scenarios

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    The paper derives analytic dark matter freeze-in yields for arbitrary power-law reheating histories and maps the gravitational production parameter space.

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