Hello, World!
Everything must start somewhere!
Killing horizons naturally define asymptotic symmetries
This may be an interesting path for new forms of holography in fundamental physics. Interestingly, it also suggests new asymptotic symmetries at null infinity, which in turn could hint at a theory of modified gravity.
The Measure of a Mass
While “mass” is a central concept in gravitation, it is very difficult to define it in relativistic settings with sufficient generality. I recently discussed this alongside Bruno Arderucio Costa.
Negative masses are unstable
The typical story for why we don’t see negative masses focuses on assuming matter microscopically has positive mass, and then showing this implies the result for large masses too. As it turns out, general relativity itself abhors negative masses through the onset of instability.
Nonperturbative Aspects of Quantum Field Theory in Curved Spacetime
My master’s thesis focused on using the functional renormalization group to understand the nonperturbative behavior of a particle detector model. Here’s an overview.