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PhD Comprehensive Exam | Hyungjin KimExport this event to calendar

Wednesday, July 10, 2019 — 2:00 PM EDT

MC 6460<--break->

Candidate

Hyungjin Kim | Applied Math, University of Waterloo

Title

Addressing the Unresolved Questions of Early Universe

 Abstract

In this presentation, I will talk about two different methods of answering unresolved questions of our early unvierse. I will use the theory of Cuscuton to avoid the Singularity problem that the current inflationary models face. This will involve writing a model where the universe undergoes a 'bounce' instead of a phase of an accelerated expansion. Then I will talk about systematically building a tool to better understand early universe, the Effective Field Theory of Inflation. Using this tool, I will explain how higher order corrections to the Lorentzian dispersion relation arises, and will go on to show which regions in parameter space such theories are valid. I will also explain the future works needed to be done on these theories.

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