Thursday, January 29, 2026
4:00 PM -
5:00 PM
Online and In-Person Event
Physics Colloquium
Series: Physics Colloquium Series
Rachel Rosen,
Associate Professor of Quantum Field Theory and Gravity,
Department of Physics,
Carnegie Mellon University,
Oh no, not de Sitter!
Strong evidence exists for two eras of accelerating expansion of our universe, indicating two epochs for which our universe can be best approximated by a de Sitter spacetime. However, out of all of the maximally symmetric spacetimes, de Sitter is arguably the most challenging spacetime for actually doing physics. In this talk I'll review some of the standard issues that arise when thinking about particle physics and gravity in asymptotically de Sitter spacetimes. I'll then discuss some recent work on causality conditions in de Sitter.
Join via Zoom:
https://caltech.zoom.us/j/84497014003
Meeting ID: 844 9701 4003
The colloquium is held in Feynman Lecture Hall, 201 E. Bridge.
Event Sponsors:
For more information, please contact Annika Keating by email at [email protected].