Stringy Insights into Effective Field Theory of Quantum Gravity

Stringy Insights into Effective Field Theory of Quantum Gravity
Patrick Jefferson, John Hopkins University
Patrick Jefferson
Date and time: Fri, Mar 01, 2024 - 2:15pm
Location: LGRT 1033
Category: ACFI Seminar
Abstract:

Understanding the fundamental principles of quantum gravity is an outstanding challenge in high energy theory that could explain various phenomena at the interface of particle physics and cosmology. Although we do not yet know how to formulate such a theory in general, the peculiar nature of “effective” field theories of quantum gravity may enable us to infer some of its properties within known theoretical frameworks. String theory, believed to be a self-consistent theory of quantum gravity, is one of the main theoretical laboratories for exploring general properties of quantum gravity along these lines. In this talk, I will give a tour of some of my research on this topic, focusing on the realization of different physical systems as coarse-grained, approximate degrees of freedom in string theory. I will discuss what this work has revealed about these systems and effective field theory, and how this research program can teach us about quantum gravity more generally.