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A publicação pode ser exportada nos seguintes formatos: referência da APA (American Psychological Association), referência do IEEE (Institute of Electrical and Electronics Engineers), BibTeX e RIS.

Exportar Referência (APA) 
Luz, P. & Lemos, J. P. S.  (2023). Relativistic cosmology and intrinsic spin of matter: Results and theorems in Einstein-Cartan theory. Physical Review D. 107 (8)
Exportar Referência (IEEE) 
P. M. Luz and J. P. Lemos,  "Relativistic cosmology and intrinsic spin of matter: Results and theorems in Einstein-Cartan theory", in Physical Review D, vol. 107, no. 8, 2023
Exportar BibTeX 
@article{luz2023_1783297720272,
	author = "Luz, P. and Lemos, J. P. S. ",
	title = "Relativistic cosmology and intrinsic spin of matter: Results and theorems in Einstein-Cartan theory",
	journal = "Physical Review D",
	year = "2023",
	volume = "107",
	number = "8",
	doi = "10.1103/PhysRevD.107.084004",
	url = "https://journals.aps.org/prd/abstract/10.1103/PhysRevD.107.084004"
}
Exportar RIS 
TY  - JOUR
TI  - Relativistic cosmology and intrinsic spin of matter: Results and theorems in Einstein-Cartan theory
T2  - Physical Review D
VL  - 107
IS  - 8
AU  - Luz, P.
AU  - Lemos, J. P. S. 
PY  - 2023
SN  - 2470-0010
DO  - 10.1103/PhysRevD.107.084004
UR  - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.107.084004
AB  - We start by presenting the general set of structure equations for the 1+3 threading spacetime decomposition in four spacetime dimensions, valid for any theory of gravitation based on a metric compatible affine connection. We then apply these equations to the study of cosmological solutions of the Einstein-Cartan theory in which the matter is modeled by a perfect fluid with intrinsic spin. It is shown that the metric tensor can be described by a generic Friedman-Lemaître-Robertson-Walker solution. However, due to the presence of torsion the Weyl tensors might not vanish. The coupling between the torsion and Weyl tensors leads to the conclusion that, in this cosmological model, the universe must either be flat or open, excluding definitely the possibility of a closed universe. In the open case, we derive a wave equation for the traceless part of the magnetic part of the Weyl tensor and show how the intrinsic spin of matter in a dynamic universe leads to the generation and emission of gravitational waves. Last, in this cosmological model, it is found that the torsion tensor, which has an intrinsic spin as its source, contributes to a positive accelerated expansion of the universe. Comparing the theoretical predictions of the model with the current experimental data, we conclude that torsion cannot completely replace the role of a cosmological constant.
ER  -