The return of the phoenix universe

Jean Luc Lehners, Paul J. Steinhardt, Neil Turok

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

Georges Lemaitre introduced the term phoenix universe to describe an oscillatory cosmology with alternating periods of gravitational collapse and expansion. This model is ruled out observationally, because it requires a supercritical mass density and cannot accommodate dark energy. However, a new cyclic theory of the universe has been proposed that evades these problems. In a recent elaboration of this picture, almost the entire universe observed today is fated to become entrapped inside black holes, but a tiny region will emerge from these ashes like a phoenix to form an even larger smooth, flat universe filled with galaxies, stars, planets, and, presumably, life. Survival depends crucially on dark energy and suggests a reason why its density is small and positive today.

Original languageEnglish (US)
Pages (from-to)2231-2235
Number of pages5
JournalInternational Journal of Modern Physics D
Volume18
Issue number14
DOIs
StatePublished - Dec 31 2009

All Science Journal Classification (ASJC) codes

  • Mathematical Physics
  • Astronomy and Astrophysics
  • Space and Planetary Science

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