3 papers
gr-qc2025
Primary black-hole scalar charges and kinetic screening in -essence-Gauss-Bonnet gravity
Guillermo Lara, Georg Trenkler, Leonardo G. Trombetta
Black holes beyond General Relativity may carry non-standard charges that impact their phenomenology. We study how the scalar charge that is induced by the scalar-Gauss-Bonnet coup…
gr-qc2024
Causality and Stability from Acoustic Geometry
Ignacy Sawicki, Georg Trenkler, Alexander Vikman
In scalar-tensor theories with derivative interactions, backgrounds spontaneously break local Lorentz invariance. We study the motion of perturbations of the scalar, "phonons", on…
hep-th2019
Generalization of the 2-form interactions
Lavinia Heisenberg, Georg Trenkler
We systematically construct derivative self-interactions for massless and massive 2-forms. There exists a no-go theorem in the literature for constructing Galileon-like Lagrangians…