# Early Universe - Quantum Cosmology

- January 07, 2018
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The study of the early Universe is driven by major new computational and observational developments on the astronomy side. It is a data-rich subject. One could work on the early phases of the Big Bang, primarily with interest in inflationary cosmology, string cosmology and cosmic magnetic fields.

One of possible specific areas of focus is in developing the dynamics of warm inflation. This is an alternative solution to some cosmological puzzles, in which aspects of thermal and non-equilibrium field theory are employed, differing from the present-day conventional inflationary model. Specifically, in conventional "supercooled" inflation, the Universe is assumed to undergo a supercooled quasi-exponential expansion that terminates with a short reheating period; this sets an appropriately high temperature to allow subsequent hot Big-Bang evolution. In contrast, warm inflation does not involve any division between supercooled expansion and reheating: radiation is produced throughout inflationary expansion and reheating is non-existent. Work on warm inflation cosmology could continue to follow three directions: quantum field theory (QFT) dissipative dynamics that realise first-principles warm inflation models; observational consequences of warm inflation, in particular scalar and tensor perturbation spectra; consequences of warm inflation for the particle physics cosmology of baryogenesis, defects, and vacuum energy. In addressing these topics, various areas of particle physics are untilized including nonequilibrium quantum field theory, supersymmetry, and gauge theory.

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