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gr-qc2026
Nonperturbative suppression of beyond-General-Relativity effects in quadratic gravity
Georgios Antoniou, Leonardo Gualtieri, Paolo Pani
Quadratic gravity is a well-motivated extension of general relativity~(GR) wherein the Einstein-Hilbert action is augmented by quadratic curvature terms. This theory is equivalent…
gr-qc2026★ 3 cited
Decay of solutions of the wave equation in cosmological spacetimes -- a numerical analysis
Flavio Rossetti, Alex Vañó-Viñuales
We numerically evolve spherically symmetric solutions to the linear wave equation on some expanding Friedmann-Lemaître-Robertson-Walker (FLRW) spacetimes and study the respective…