Gravitational and Phenomenological Properties of Early Universe Defects

Abstract: The early universe is predicted to have witnessed a range of symmetry breaking and phase transitions. These processes can be studied via the objects and signals they may produce. In this talk, we will focus on topological defects formed by symmetry breaking, discuss the final states they may give rise to, and consider the possibility of detection from a combination of phenomenological and cosmological perspectives. In particular, we introduce a composite defect that may form in an axionic cosmology, and investigate resulting alternatives to the standard picture in the face of unique interactions.

general relativity and quantum cosmologyHEP - theorymathematical physics

Audience: advanced learners

( paper )

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Europe and Pacific Theoretical Physics

Series comments: European and Pacific Theoretical Physics is a group that runs online seminars and talks across broad topics in mathematical and theoretical physics. Our goal is to share concepts across continents to bring about a deeper understanding of cutting-edge topics in physics.

The talks are informal, and anyone can participate, so please reach out if you would like to present one week!

Extended notes & presentation material are uploaded to "Past talks". Please click on the title of a talk, and then click on "paper" or "slides" to see more. Our focus for 2025 was on Generalised (Categorical) Symmetries, following the lecture notes found here: arxiv.org/pdf/2411.09082.

The reading course seminars are scheduled to resume in 2026. If you would like to present material, please reach out.

Zoom link: unibe-ch.zoom.us/j/6801537904

Watch previous talks on YouTube: www.youtube.com/@eupactp

Mailing list sign-up: forms.gle/StswcjC7RbXWuvAr8

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