Fundamental Physics, the Swampland of Effective Field Theory and Early Universe Cosmology. (arXiv:1911.06058v1 [hep-th])
<a href="http://arxiv.org/find/hep-th/1/au:+Brandenberger_R/0/1/0/all/0/1">Robert Brandenberger</a> (McGill University)
Cosmological inflation is not the only early universe scenario consistent
with current observational data. I will discuss the criteria for a successful
early universe cosmology, compare a couple of the proposed scenarios
(inflation, bouncing cosmologies, and the {it emergent} scenario), focusing on
how future observational data will be able to distinguish between them. I will
argue that we need to go beyond effective field theory in order to understand
the early universe, and that principles of superstring theory will yield a
nonsingular cosmology.
Cosmological inflation is not the only early universe scenario consistent
with current observational data. I will discuss the criteria for a successful
early universe cosmology, compare a couple of the proposed scenarios
(inflation, bouncing cosmologies, and the {it emergent} scenario), focusing on
how future observational data will be able to distinguish between them. I will
argue that we need to go beyond effective field theory in order to understand
the early universe, and that principles of superstring theory will yield a
nonsingular cosmology.
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