Zobrazeno 1 - 10
of 123
pro vyhledávání: '"Escobedo, Ricardo"'
In this article we analyze an effective action derived from a 7-dimensional $BF$ theory that, upon dimensional reduction, it transforms into an effective 4-dimensional action. Such resulting effective action involves a generic metric; however, we stu
Externí odkaz:
http://arxiv.org/abs/2312.10443
We study the Post-Newtonian approach implemented to the Einstein-Hilbert action adding the cosmological constant $\Lambda$ at 1PN order. We consider very small values of $\Lambda$ to derive the Lagrangian of a two body compact system at the center of
Externí odkaz:
http://arxiv.org/abs/2308.13012
Publikováno v:
Physical Review D 106, 084009 (2022)
We study minimal and nonminimal couplings of fermions to the Palatini action in $n$ dimensions ($n\geq 3$) from the Lagrangian and Hamiltonian viewpoints. The Lagrangian action considered is not, in general, equivalent to the Einstein-Dirac action pr
Externí odkaz:
http://arxiv.org/abs/2210.07378
Publikováno v:
Gen. Relativ. Gravit. 53, 52 (2021)
We perform, in a manifestly $SO(n-1,1)$ [$SO(n)$] covariant fashion, the Hamiltonian analysis of general relativity in $n$ dimensions written as a constrained $BF$ theory. We solve the constraint on the $B$ field in a way naturally adapted to the fol
Externí odkaz:
http://arxiv.org/abs/2106.02057
In this paper we perform in a manifestly $SO(n-1,1)$ [or, alternatively $SO(n)$] covariant fashion, the canonical analysis of general relativity in $n$ dimensions written as a constrained $BF$ theory. Since the Lagrangian action of the theory can be
Externí odkaz:
http://arxiv.org/abs/2010.14526
Publikováno v:
Phys. Rev. D 101, 024042 (2020)
We carry out the canonical analysis of the $n$-dimensional Palatini action with or without a cosmological constant $(n\geq3)$ introducing neither second-class constraints nor resorting to any gauge fixing. This is accomplished by providing an express
Externí odkaz:
http://arxiv.org/abs/1912.01019
Publikováno v:
Phys. Rev. D 98, 124002 (2018)
We work on a spacetime manifold foliated by timelike leaves. In this setting, we explore the solution of the second-class constraints arising during the canonical analysis of the Holst action with a cosmological constant. The solution is given in a m
Externí odkaz:
http://arxiv.org/abs/1812.02755
Akademický článek
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Publikováno v:
Revista Horizonte Médico; jul-set2024, Vol. 24 Issue 3, p90-101, 12p
Publikováno v:
Revista Medica Herediana. ene-mar2023, Vol. 34 Issue 1, p20-26. 7p.