Linear and second-order geometry perturbations on spacetimes with torsion

Abstract In order to study gravitational waves in any realistic astrophysical scenario, one must consider geometry perturbations up to second order. Here, we present a general technique for studying linear and quadratic perturbations on a spacetime with torsion. Besides the standard metric mode, a “torsionon” perturbation mode appears. This torsional mode will be able to propagate only in a certain kind of theories.

# Astrophysics # Nuclear and particle physics. Atomic energy. Radioactivity

Fernando Izaurieta, Eduardo Rodríguez, Omar Valdivia (2019). "Linear and second-order geometry perturbations on spacetimes with torsion". European Physical Journal C: Particles and Fields. https://doi.org/10.1140/epjc/s10052-019-6852-y