PIRSA:22040116 Scientific Series Cosmology

DOI10.48660/22040116

Series: Cosmology and Gravitation

D'Amico, G. (2022). Rollercoaster Cosmology, and a Gravity Wave Factory. Perimeter Institute. https://pirsa.org/22040116

D'Amico, Guido. Rollercoaster Cosmology, and a Gravity Wave Factory. Perimeter Institute, Apr. 12, 2022, https://pirsa.org/22040116 

@misc{ pirsa_PIRSA:22040116,
  doi = {10.48660/22040116},
  url = {https://pirsa.org/22040116},
  author = {D{\textquoteright}Amico, Guido},
  keywords = {Cosmology},
  language = {en},
  title = {Rollercoaster Cosmology, and a Gravity Wave Factory},
  publisher = {Perimeter Institute},
  year = {2022},
  month = {apr},
  note = {PIRSA:22040116 see, \url{https://pirsa.org}}
}

Abstract

Does inflation have to happen all in one go? The answer is no!

All cosmological problems can be solved by a sequence of bursts of cosmic acceleration, interrupted by short epochs of decelerated expansion.

In this rollercoaster cosmology, models that seem excluded for a single long stage become viable again, and high-scale inflation is more natural.

At the same time, we expect interesting predictions at several different length scales, such as gravitational wave signals potentially detectable by LISA.

I will describe the general framework, and focus on a realization with two stages of monodromy inflation.

Zoom Link: https://pitp.zoom.us/j/99206384855?pwd=dUpDdWVxV1lXc0g1bU9uZ2lrMzVXUT09

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