- Prof. Peter Diener uses high performance computing techniques to aid the development of analytical calculations for the radiation reaction problem in general relativity. He also studies numerically the binary black hole problem in general relativity. With Dr. Frank Löffler and others he developed the Einstein toolkit, a community computational infrastructure for relativistic astrophysics. In collaboration with Profs. Parampreet Singh (Physics and Astronomy) and Jorge Pullin he applies advanced computational techniques to the evolution of the quantum Einstein equations in the context of loop quantum cosmology.