Justin L. Ripley


Current position

I am a research associate at the Department of Applied Math and Theoretical Physics at the University of Cambridge.


I obtained my PhD from the Department of Physics, Princeton University. My adviser was Frans Pretorius. My thesis: pdf.

Research Interests

My research centers around ``strong field gravity'', and includes: black hole perturbation theory (and the leading nonlinear dynamics of gravitational waves around black holes, for use in gravitational wave source modeling) and the dynamics of ``modified gravity'' theories (for use in tests of General Relativity and modeling the early universe). For my research I mostly use the tools of numerical relativity and perturbation theory.

Permanent email address:

lloydripley [at] gmail [dot] com


My CV: pdf


My GitHub account


Links to my publications:

InSpire HEP

Google Scholar


Orcid ID

ORCID iD iconhttps://orcid.org/0000-0001-7192-0021


PhD defense on modified gravity. (July 1, 2020; virtual) pdf

Talk on Einstein dilaton Gauss-Bonnet gravity. Given at the Perimeter Institute (April 9, 2020; virtual) pdf