Numerical Relativity - beyond General Relativity

Abstract: We will explore the long path from Einstein's equations to computational simulations. I will discuss how Numerical Relativity (NR) can serve as a tool to understand gravitational wave generation in dark energy models and what challenges must be overcome to extend NR in these theories. In particular, I will consider a class of alternative theories of gravity known as k-essence. This cosmologically relevant scalar-tensor theory involves first-order derivative self-interactions, which pass all existing gravitational wave bounds and provide a screening mechanism. Specifically, I will present our numerical simulations of this theory considering three different scenarios: nonlinear stellar oscillations, gravitational collapse, and binary neutron stars.

astrophysicscondensed mattergeneral relativity and quantum cosmologyhigh energy physicsmathematical physicsclassical physicsgeneral physics

Audience: researchers in the topic

Theoretical physics seminar @ Tartu