arXiv subjects

Irene Sanchez-Ruiz

Publications and source records attributed to Irene Sanchez-Ruiz.

2 recordsLinked to original sources

arXiv2024

Gravitons in a gravitational plane wave

Gravitational plane waves (when Ricci flat) belong to the VSI family. The achronym VSI stands for vanishing scalar invariants, meaning that all scalar invariants built out of Riemann tensor and its derivatives vanish, although the Riemann tensor itself does not. In the particular case of plane waves many interesting phenomena have been uncovered for strings propagating in this background. Here we comment on gravitons propagating in such a spacetime, which itself presumably consists of an Avogadro number of such gravitons.

hep-th↗

arXiv2023

Physical charges versus conformal invariance in unimodular gravity

Unimodularity can be implemented in different ways. In this paper we consider only the formulation of Unimodular Gravity in which the unimodular metric is obtained out of an unrestricted one as $\g_{\m\n}=|g|^{-{1\over n}} g_{\m\n}$. This procedure induces an extra Weyl symmetry. Some physical implications of this symmetry on the conserved currents are discussed. Finally the results are illustrated for the Painlevé-Gullstrand extension of Schwarzschild spacetime.

gr-qc↗