Designing Cyclic Universe Models

Justin Khoury, Paul J. Steinhardt, and Neil Turok
Phys. Rev. Lett. 92, 031302 – Published 22 January 2004

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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  • Received 15 July 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.031302

©2004 American Physical Society

Authors & Affiliations

Justin Khoury1, Paul J. Steinhardt2, and Neil Turok3

  • 1ISCAP, Columbia University, New York, New York 10027, USA
  • 2Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544, USA
  • 3DAMTP, CMS, Wilberforce Road, Cambridge CB3 0WA, United Kingdom

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Issue

Vol. 92, Iss. 3 — 23 January 2004

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