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gr-qc2026
Effects of massive spin-2 fields on gravitational wave propagation
Jose A. R. Cembranos, Álvaro Cendal, Hector Villarrubia-Rojo
Massive spin-2 fields in addition to the standard massless graviton arise naturally in extensions of general relativity, such as massive bigravity or models with extra dimensions.…
gr-qc2024★ 5 cited
From loop quantum gravity to cosmology: the two-vertex model
Álvaro Cendal, Iñaki Garay, Luis J. Garay
We study the notion of volume and its dynamics in the loop-quantum-gravity truncation known as the two-vertex model. We also show that its U(N)-symmetry reduction provides the old…