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Junction conditions of Palatini f (R,T) gravity



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Rosa, Joao Luis and Rubiera García, Diego (2022) Junction conditions of Palatini f (R,T) gravity. Physical review D, 106 (6). ISSN 2470-0010

[thumbnail of Rubiera, D 35 libre.pdf]

Official URL: http://dx.doi.org/10.1103/PhysRevD.106.064007


We work out the junction conditions for the Palatini f(R, T) extension of general relativity, where f is an arbitrary function of the curvature scalar R of an independent connection, and of the trace T of the stress -energy tensor of the matter fields. We find such conditions on the allowed discontinuities of several geometrical and matter quantities, some of which depart from their metric counterparts, and in turn extend their Palatini f(R) versions via some new T-dependent terms. Moreover, we also identify some "exceptional cases " of f(R,T) Lagrangians such that some of these conditions can be discarded, thus allowing for further discontinuities in R and T and, in contrast with other theories of gravity, they are shown to not give rise to extra components in the matter sector, e.g., momentum fluxes and double gravitational layers. We discuss how these junction conditions, together with the nonconservation of the stress-energy tensor ascribed to these theories, may induce nontrivial changes in the shape of specific applications such as traversable thin-shell wormholes.

Item Type:Article
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© 2022 American Physical Society
J. L. R. is supported by the European Regional Development Fund and the program Mobilitas Pluss (MOBJD647), and thanks the Department of Theoretical Physics at the Complutense University of Madrid for their hospitality during the elaboration of this work. D. R.-G. is funded by the Atraccion de Talento Investigador program of the Comunidad de Madrid (Spain) No. 2018T1/TIC-10431 and acknowledges further support from the Ministerio de Ciencia, Innovacion y Universidades (Spain) Project No. PID2019-108485 GB-I00/AEI/10.13039/501100011033 ("PGC Generacion de Conocimiento") and the FCT Projects No. PTDC/FIS-PAR/31938/2017 and No. PTDC/FIS-OUT/29048/2017. This work is also supported by the project PROMETEO/2020/079 (Generalitat Valenciana) and the Edital 006/2018 PRONEX (FAPESQ-PB/CNPQ, Brazil, Grant No. 0015/2019). This article is based upon work from COST Action CA18108, supported by COST (European Cooperation in Science and Technology).

Uncontrolled Keywords:Inflation; Wormholes; Stars
Subjects:Sciences > Physics > Physics-Mathematical models
Sciences > Physics > Mathematical physics
ID Code:75360
Deposited On:07 Nov 2022 18:42
Last Modified:13 Feb 2023 19:24

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