Linear and Second-order Geometry Perturbations on Spacetimes with Torsion
arXiv:1901.06400 · doi:10.1140/epjc/s10052-019-6852-y
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.
arXiv comment6 pages, no figures. v2: version accepted for publication in EPJC
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