https://doi.org/10.1140/epjc/s10052-017-5502-5
Letter
Einstein and Rastall theories of gravitation in comparison
1
Research Institute for Astronomy and Astrophysics of Maragha (RIAAM), Maragha, 55134-441, Iran
2
Department of Physics, Azarbaijan Shahid Madani University, Tabriz, Iran
3
ISEM, Institute for Scientific Methodology, Palermo, PA, Italy
4
School of Advanced International Studies on Applied Theoretical and Non Linear Methodologies in Physics, Bari, Italy
* e-mail: cordac.galilei@gmail.com
Received:
16
December
2017
Accepted:
21
December
2017
Published online:
13
January
2018
We profit by a recent paper of Visser claiming that Rastall gravity is equivalent to Einstein gravity to compare the two gravitational theories in a general way. Our conclusions are different from Visser’s ones. We indeed argue that these two theories are not equivalent. In fact, Rastall theory of gravity is an “open” theory when compared to Einstein general theory of relativity. Thus, it is ready to accept the challenges of observational cosmology and quantum gravity.
© The Author(s), 2018
