2023/02/12 by Alvarez, Enrique, Anero, Jesus, Sanchez-Ruiz, Irene
#FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th)
paper · doi:10.48550/arxiv.2302.05877
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.