I used to be fanatical about physics in high school -- I'm less so now, but as my attention has had to be split between a million other things (like starting a company and working full-time at the same time) I've narrowed my interest to one particular pursuit.
I'm most fascinated by the geometry of space and time -- its structure and how we describe it.
My current project in physics is what I call a causal model for spacetime geometry, which defines a new geometric structure for how to think about spacetime -- from a simple backdrop to a web of events happening in time, connected through cause and effect.
In more technical terms, I'm investigating a topology that results from a discontinuous transform on the classical pseudo-Riemann manifold of spacetime. This transform models spacetime as a vector space in which adjacency of points is determined by causal connectedness -- i.e. the neighborhood of points around a given event is defined by the causal relationship between the given point and the points in its neighborhood. This model has shown potential to simplify the mathematics of Einstein's relativity and allow for dramatically simpler approaches to quantization on a dynamic background.
Physics is at the root of how I understand nature, and contrary to what the world seems to believe, it's a dynamic tapestry of contributions from millions of physicists, mathematicians, and scientists, still evolving every day. I enjoy being a part of that collective to better understand the stage on which we have the privilege of admiring the symmetry of nature.