Ponente
Descripción
Within the framework of recovering general relativity from the classical limit of scattering amplitudes, it is possible to compute the metric induced by the most generic rotating spherically-symmetric matter configuration at quadrupole order by considering stationary massive spin-1 particles emitting gravitons. Such metric depends on several free numerical parameters, and it is possible to show that while some of them are just a gauge artifact, some others are physical. As expected, in four dimensions the physical parameter is just one, namely the mass quadrupole, while in higher dimensions we find a new quadrupole term that characterizes the source. Moreover, due to the underlying QFT that describes the source particle, we are able to determine which space-time geometry corresponds to the minimally-coupled theory. In this direction, we prove that while in four dimensions the “simplest QFT” is actually a Kerr black hole, in higher dimensions there is no known solution that resembles our metric.
