Berezin, V.; Dokuchaev, V.; Eroshenko, Y.; Smirnov, A. Quadratic Gravity, Double Layers and Non-Conservative Energy-Momentum Tensor. Preprints2020, 2020090363. https://doi.org/10.20944/preprints202009.0363.v1
APA Style
Berezin, V., Dokuchaev, V., Eroshenko, Y., & Smirnov, A. (2020). Quadratic Gravity, Double Layers and Non-Conservative Energy-Momentum Tensor. Preprints. https://doi.org/10.20944/preprints202009.0363.v1
Chicago/Turabian Style
Berezin, V., Yury Eroshenko and Alexey Smirnov. 2020 "Quadratic Gravity, Double Layers and Non-Conservative Energy-Momentum Tensor" Preprints. https://doi.org/10.20944/preprints202009.0363.v1
Abstract
In the present paper we investigate the conservative conditions in Quadratic Gravity. It is shown explicitly that the Bianchi identities lead to the conservative condition of the left-hand-side of the (gravitational) field equation. Therefore, the total energy-momentum tensor is conservative in the bulk (like in General Relativity). However, in Quadratic Gravity it is possible to have singular hupersurfaces separating the bulk regions with different behavior of the matter energy-momentum tensor or different vacua. They require special consideration. We derived the conservative conditions on such singular hypersurfaces and demonstrated the very possibility of the matter creation. In the remaining part of the paper we considered some applications illustrating the obtained results.
Keywords
gravitation; General Relativity; quadratic gravity; black holes; cosmology
Subject
Physical Sciences, Mathematical Physics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
