3 papers
astro-ph.CO2026
AI--Assisted Exploration: DHOST Theories without Quantum Ghosts
Ginevra Braga, Raul Jimenez, Sabino Matarrese
We ask whether a local symmetry can organize both classical degeneracy and perturbative stability in DHOST theories. An AI-assisted search finds a candidate in a constant-disformal…
astro-ph.CO2026
Gravitational-wave lensing beyond rays: a disordered-system approach
Ripalta Amoruso, Ginevra Braga, Alice Garoffolo +3
We develop a framework to describe gravitational wave propagation through a stochastic distribution of weak gravitational lenses beyond the geometric optics limit. We model the len…
astro-ph.CO2024
Proper time path integrals for gravitational waves: an improved wave optics framework
Ginevra Braga, Alice Garoffolo, Angelo Ricciardone +2
When gravitational waves travel from their source to an observer, they interact with matter structures along their path, causing distinct deformations in their waveforms. In this s…