2 papers
hep-th2024
Gravitons in a gravitational plane wave
Enrique Alvarez, Jesus Anero, Irene Sanchez-Ruiz
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 Riema…
gr-qc2023
Physical charges versus conformal invariance in unimodular gravity
Enrique Alvarez, Jesus Anero, Irene Sanchez-Ruiz
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 unrest…