PIRSA:10110050 Scientific Series Cosmology

DOI10.48660/10110050

Series: Cosmology and Gravitation

Amin, M. (2010). Lumps and bumps in the early universe. Perimeter Institute. https://pirsa.org/10110050

Amin, Mustafa. Lumps and bumps in the early universe. Perimeter Institute, Nov. 09, 2010, https://pirsa.org/10110050 

@misc{ pirsa_PIRSA:10110050,
  doi = {10.48660/10110050},
  url = {https://pirsa.org/10110050},
  author = {Amin, Mustafa},
  keywords = {Cosmology},
  language = {en},
  title = {Lumps and bumps in the early universe},
  publisher = {Perimeter Institute},
  year = {2010},
  month = {nov},
  note = {PIRSA:10110050 see, \url{https://pirsa.org}}
}

Abstract

I will discuss the emergence of large, localized, pseudo-stable configurations (oscillons) from inflaton fragmentation at the end of inflation. Remarkably, the emergent oscillons take up >50 per cent of the energy density of the inflaton. First, I will give an overview of oscillons, provide some analytic solutions and discuss their stability. Then, I will discuss the conditions necessary for their emergence and provide estimates for their cosmological number density. I will show results from detailed 3+1-dimensional numerical simulations and compare them to the analytic estimates. Finally, I discuss possible observational consequences of oscillons in the early universe.

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