Supersmoothing through slow contraction

William G. Cook, Iryna A. Glushchenko, Anna Ijjas, Frans Pretorius, Paul J. Steinhardt

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


Performing a fully non-perturbative analysis using the tools of numerical general relativity, we demonstrate that a period of slow contraction is a “supersmoothing” cosmological phase that homogenizes, isotropizes and flattens the universe both classically and quantum mechanically and can do so far more robustly and rapidly than had been realized in earlier studies.

Original languageEnglish (US)
Article number135690
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
StatePublished - Sep 10 2020

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


  • Bouncing cosmology
  • Cosmological bounce
  • Cyclic universe
  • Slow contraction


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