Designing cyclic universe models |
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Authors: | Khoury Justin Steinhardt Paul J Turok Neil |
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Affiliation: | ISCAP, Columbia University, New York, New York 10027, USA. |
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Abstract: | The phenomenological constraints on the scalar field potential in cyclic models of the Universe are presented. 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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