New Horizons for Psi workshop

This set of notes was designed to accompany two hours of lectures and practical exercises at the New Horizons in Psi workshop \url{https://strong-gr.com/new-horizons-for-psi}, entitled "Studying fundamental fields with numerical relativity".

Numerical relativity has been used to study a range of situations involving fundamental fields, including superradiance, modified gravity, dynamical friction, dark matter accretion and early universe cosmology. The purpose of this course was to provide some background and hands on experience in numerical relativity that would help students and researchers to better understand the possibilities and limitations provided by this tool.

The version of the code used for the exercises can be found in the branch NewHorizonsForPsi, which I will retain as it is, although in general you should use the most up to date version of the code.