4 papers
Generalized Kerr-Schild gauge
Enrique Alvarez, Jesus Anero
The Kerr-Schild gauge is generalized to the case that the vector generating the deformation is not null. Contrary to naive expectations, this vector generates a finite expansion fo…
One loop analysis of the cubic action for gravity
Enrique Alvarez, Jesus Anero, Carmelo P. Martin
We analyze some aspects of the cubic action for gravity recently proposed by Cheung and Remmen, which is a particular instance of a first order (Palatini) action. In this approach…
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…
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…