Bibliographies thématiques / Teleparallelismo

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Littérature scientifique sur le sujet « Teleparallelismo »

Auteur : Grafiati
Publié le 10 mars 2023
Mis à jour le 11 mars 2023

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Articles de revues sur le sujet "Teleparallelismo"

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D’Ambrosio, Fabio, Lavinia Heisenberg et Simon Kuhn. « Revisiting cosmologies in teleparallelism ». Classical and Quantum Gravity 39, no 2 (23 décembre 2021) : 025013. http://dx.doi.org/10.1088/1361-6382/ac3f99.

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Abstract We discuss the most general field equations for cosmological spacetimes for theories of gravity based on non-linear extensions of the non-metricity scalar and the torsion scalar. Our approach is based on a systematic symmetry-reduction of the metric-affine geometry which underlies these theories. While for the simplest conceivable case the connection disappears from the field equations and one obtains the Friedmann equations of general relativity, we show that in f ( Q ) cosmology the connection generically modifies the metric field equations and that some of the connection components become dynamical. We show that f ( Q ) cosmology contains the exact general relativity solutions and also exact solutions which go beyond. In f ( T ) cosmology, however, the connection is completely fixed and not dynamical.
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FIORINI, FRANCO, et RAFAEL FERRARO. « A TYPE OF BORN-INFELD REGULAR GRAVITY AND ITS COSMOLOGICAL CONSEQUENCES ». International Journal of Modern Physics A 24, no 08n09 (10 avril 2009) : 1686–89. http://dx.doi.org/10.1142/s0217751x09045236.

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Born-Infeld deformation strategy to smooth theories having divergent solutions is applied to the teleparallel equivalent of General Relativity. The equivalence between teleparallelism and General Relativity is exploited to obtain a deformed theory of gravity based on second order differential equations, since teleparallel Lagrangian is built just from first derivatives of the vierbein. We show that Born-Infeld teleparallelism cures the initial singularity in a spatially flat FRW universe; moreover, it provides a natural inflationary stage without resorting to an inflaton field. The Born-Infeld parameter λ bounds the dynamics of Hubble parameter H(t) and establishes a maximum attainable spacetime curvature.
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Maluf, J. W., et A. Goya. « Space–time defects and teleparallelism ». Classical and Quantum Gravity 18, no 23 (22 novembre 2001) : 5143–54. http://dx.doi.org/10.1088/0264-9381/18/23/310.

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VON BORZESZKOWSKI, HORST-HEINO. « TELEPARALLELIZED AND AFFINE THEORIES OF GRAVITY : NEW PERSPECTIVES FOR MACHIAN AND QUANTUM GRAVITY ». International Journal of Modern Physics A 17, no 29 (20 novembre 2002) : 4153–60. http://dx.doi.org/10.1142/s0217751x02013174.

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We compare metric theories to theories with teleparallelism and affine theories of gravity in order to discuss perspectives in the canonical quantization of gravity opened by a realization of Mach's principle.
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Korunur, M., M. Saltı et O. Aydogdu. « An axially symmetric scalar field and teleparallelism ». European Physical Journal C 50, no 1 (6 février 2007) : 101–7. http://dx.doi.org/10.1140/epjc/s10052-006-0195-1.

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Nishino, Hitoshi, et Subhash Rajpoot. « Teleparallelism for a massive spin-2 field ». Classical and Quantum Gravity 28, no 12 (26 mai 2011) : 125019. http://dx.doi.org/10.1088/0264-9381/28/12/125019.

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Lawrence, Tom. « Tangent space symmetries in general relativity and teleparallelism ». International Journal of Geometric Methods in Modern Physics 18, supp01 (26 avril 2021) : 2140008. http://dx.doi.org/10.1142/s0219887821400089.

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This paper looks at how changes of coordinates on a pseudo-Riemannian manifold induce homogeneous linear transformations on its tangent spaces. We see that a pseudo-orthonormal frame in a given tangent space is the basis for a set of Riemann normal coordinates. A Lorentz subgroup of the general linear transformations preserves this pseudo-orthonormality. We borrow techniques from the methodology of non-linear realizations to analyze this group-subgroup structure. “Parallel maps” are used to relate tangent space at different points. “Parallelisms” across a finite region of the manifold may be built up from them. These are used to define Weitzenböck connections and Levi-Civita connections. This provides a new formulation of teleparallel gravity, in which the tetrad field is viewed as a field-valued group element relating the coordinate basis to the frame basis used in defining a parallelism. This formulation separates the metric degrees of freedom from those associated with the choice of parallelism. The group element can be combined by matrix multiplication with Lorentz transformations of frame or with other Jacobian matrices. We show how this facilitates a new understanding of inertial forces and local Lorentz transformations. The analysis is also applied to translations of the coordinates. If they are constant across spacetime, this has no effect on the tangent space bases. If the translation parameters become fields, they induce general linear transformations of the coordinate basis; however, the tetrad components can only be expressed in terms of translations on a flat spacetime.
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Bamba, Kazuharu, Jaume de Haro et Sergei D. Odintsov. « Future singularities and teleparallelism in loop quantum cosmology ». Journal of Cosmology and Astroparticle Physics 2013, no 02 (5 février 2013) : 008. http://dx.doi.org/10.1088/1475-7516/2013/02/008.

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Delphenich, DH. « The use of the teleparallelism connection in continuum mechanics ». Mathematics and Mechanics of Solids 21, no 10 (6 août 2016) : 1260–75. http://dx.doi.org/10.1177/1081286514563819.

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NASHED, GAMAL G. L. « ENERGY OF SPHERICALLY SYMMETRIC SPACE–TIMES ON REGULARIZING TELEPARALLELISM ». International Journal of Modern Physics A 25, no 14 (10 juin 2010) : 2883–95. http://dx.doi.org/10.1142/s0217751x10049037.

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We calculate the total energy of an exact spherically symmetric solutions, i.e. Schwarzschild and Reissner–Nordström, using the gravitational energy–momentum 3-form within the tetrad formulation of general relativity. We explain how the effect of the inertial makes the total energy unphysical. Therefore, we use the covariant teleparallel approach which makes the energy always physical one. We also show that the inertial has no effect on the calculation of momentum.
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Thèses sur le sujet "Teleparallelismo"

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Capriolo, Maurizio. « Lo pseudotensore energia-impulso in teorie estese della gravitazione ». Doctoral thesis, Universita degli studi di Salerno, 2018. http://elea.unisa.it:8080/xmlui/handle/10556/4238.

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2016 - 2017
The gravitational field’s energy and momentum definitions are treated in extensive gravitation theories, through the generalization of the energymomentum pseudotensor, defined by Einstein in general relativity. This extension was obtained by modifying the Lagrangian of Hilbert-Einstein or by using a different connection from the one of Levi- Civita as that of Weitzenböck for teleparallel theories. We have firstly obtained the gravitational energy-momentum pseudotensor for extended Lagrangians that depend on the metric gμ⌫ and on its derivatives up to nth order and then demonstrated, in general, its affine and non-covariant behavior. Then we applied the weak field limit to Euler-Lagrange equations associated to the Lagrangian which depends linearly on the ⇤R terms and derived the modified gravitational waves with six polarization states, three transverse and three not, with helicity 0 and 2. Subsequently we have obtained, through the Noether theorem for infinitesimal rigid translations, the relative energy-momentum pseudotensor and after having developed it to the order h2 and mediated on an suitable domain, we have calculated the power emitted from a possible gravitational radiant source. For gravity f (R) and f (T) we have obtained the respective energy-momentum pseudotensors and, via the border therm B which connects the curvature R to the torsion T, we have studied the relative pseudotensor ⌧↵ #|!(T,B) allowing us to link ⌧↵ #|f(R) and ⌧↵ #|f(T). Finallywehave obtained the equations for two theories of higher order telepallel gravity: in particular for the Lagrangian L⇤kT = h ! T + Pp k=0 akT⇤kT # and for the sixth order telepallel gravity equivalent to LR⇤R = p−g (−R + a0R2 + a1R⇤R). [edited by author]
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Livres sur le sujet "Teleparallelismo"

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Mashhoon, Bahram. Extension of General Relativity. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198803805.003.0005.

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Nonlocal general relativity (GR) requires an extension of the mathematical framework of GR. Nonlocal GR is a tetrad theory such that the orthonormal tetrad frame field of a preferred set of observers carries the sixteen gravitational degrees of freedom. The spacetime metric is then defined via the orthonormality condition. The preferred frame field is used to define a new linear Weitzenböck connection in spacetime. The non-symmetric Weitzenböck connection is metric compatible, curvature-free and renders the preferred (fundamental) frame field parallel. This circumstance leads to teleparallelism. The fundamental parallel frame field defined by the Weitzenböck connection is the natural generalization of the parallel frame fields of the static inertial observers in a global inertial frame in Minkowski spacetime. The Riemannian curvature of the Levi-Civita connection and the torsion of the Weitzenböck connection are complementary aspects of the gravitational field in extended GR.
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Chapitres de livres sur le sujet "Teleparallelismo"

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Mielke, Eckehard W. « Teleparallelism ». Dans Geometrodynamics of Gauge Fields, 109–36. Cham : Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-29734-7_6.

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Pereira, José G. « Teleparallelism : A New Insight into Gravity ». Dans Springer Handbook of Spacetime, 197–212. Berlin, Heidelberg : Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41992-8_11.

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RAPOPORT, DIEGO. « TELEPARALLELISM, BROWNIAN MOTION, QUANTUM MECHANICS AND FLUID-DYNAMICS, I ». Dans The Ninth Marcel Grossmann Meeting, 1096–97. World Scientific Publishing Company, 2002. http://dx.doi.org/10.1142/9789812777386_0174.

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Actes de conférences sur le sujet "Teleparallelismo"

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MIELKE, ECKEHARD W., et ALí A. RINCÓN MAGGIOLO. « YANG-MILLS TYPE BRST AND CO-BRST ALGEBRA FOR TELEPARALLELISM ». Dans Proceedings of 2002 International Conference. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812772732_0026.

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BARBOSA, ANA LUCIA, et V. C. DE ANDRADE. « NON-ABELIAN TELEPARALLELISM AS AN EXTENDED GAUGE THEORY : A GEOMETRICAL VIEW ». Dans Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF). World Scientific Publishing Company, 2006. http://dx.doi.org/10.1142/9789812704030_0136.

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SłAWIANOWSKI, JAN J. « TELEPARALLELISM, MODIFIED BORN-INFELD NONLINEARITY AND SPACE-TIME AS A MICROMORPHIC ETHER ». Dans Proceedings of 2002 International Conference. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812772732_0037.

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