Numerical UV Completion of Galileon models

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• Mary Gerhardinger (University of Pennsylvania)
• Friday 05 December 2025, 13:00-14:00
• Potter Room / Zoom : https://cam-ac-uk.zoom.us/j/85131795570.

If you have a question about this talk, please contact Daniela Cors.

Galileon theories provide a useful testing ground for understanding Effective Field Theories (EFTs), both as modified-gravity models and as particle theories with nontrivial higher-derivative interactions. These higher-derivative terms are essential for ensuring local scale screening, but they also render these theories not technically well-posed. This is not an issue when treating them as valid EFTs, however, it becomes a major issue when numerically simulating their dynamics: the nonlinear evolution of Galileons excites high-frequency modes that rapidly destabilize the computation. I will present three methods we developed to regulate these high-k modes and enable stable evolution of Galileon dynamics. I will compare the performance and limitations of each approach, and show the first fully nonlinear simulations of the quartic Galileon.

This talk is part of the DAMTP Friday GR Seminar series.

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