Deep Learning Projects

Upcoming PDExAI

Upcoming work applying ML methods to improve PDE methods for general relativity.

In collaboration with Thomas Edwards, James Alvey
SynthRAD AI competition

In this work we translated MRI images to CT images using Pix2Pix (cGAN) as well as a diffusion based model with Controlnet.

 

In collaboration with Jessica Dafflon [NIH], Walter Hugo Lopez Pinaya [King's College London]

Work in numerical relativity

Non-linearities in highly boosted black hole head-on merger

Published by PRL

ArXiv: 2208.07374 

In this work, we used simulations of highly boosted black holes to study the aftermath and if non-linear effects are needed to describe the process. 

 

In collaboration with Mark Ho-Yeuk Cheung, Vishal Baibhav, Emanuele Berti, Vitor Cardoso, Gregorio Carullo, Roberto Cotesta, Walter Del Pozzo, Francisco Duque, Estuti Shukla, Kaze W. K. Wong
Boson Star Ringdown

Published in CQG 

ArXiv: 2207.05690

with generated data available here 

Using new ideas and developments, we study and perform some of the longes simulations of a boson-star Ringdown ever performed. We find that the resulting gravitational waves are potential smoking gun signals for the existence of boson stars, an exotic cousin of neutron stars. 

In collaboration with Robin Croft, Bo-Xuan Ge, Miren Radia, Tamara Evstafyeva, Eugene A. Lim, Ulrich Sperhake, Katy Clough
Dynamic Friction in scalar fields

Published in PRD

ArXiv: 2106.08280

Using smart assumptions on the physics, we reduce the cost of simulations drastically, which allows us to simulate with high fidelity the motion of a black hole through a medium, which is a scalar field in this case.

In collaboration with Dina Traykova, Katy Clough, Emanuele Berti, Pedro G. Ferreira, Lam Hui
Proca superradiance

Accepted by PRL

ArXiv: 2204.10868

Accepted by PRD

ArXiv: 2201.08305

Two studies present various aspects of superradiance, which is a process that extracts energy from the spin of a black hole and causes the exponential growth of a scalar field cloud.

In collaboration with Zipeng Wang, Katy Clough, Helvi Witek, Emanuele Berti