Einstein-cartan theory
WebApr 9, 2024 · “@davidhrousseau @MonniauxD … Or, de plus, les concepts mathématiques étaient mûrs grâce aux travaux de Ricci-Curbastro et Levi-Civita (et avant eux, bien sûr, Riemann et Christoffel). Et les esprits capables de les relier à la physique étaient là: au moins Hilbert, M. Grossmann ou É. Cartan. …” WebThe Einstein–Cartan Theory (ECT) of gravity is a modification of General Relativity Theory (GRT), allowing space-time to have torsion, in addition to curvature, and relating torsion …
Einstein-cartan theory
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WebMar 28, 2024 · In the present work, we investigate wormhole structures and the energy conditions supporting them in Einstein-Cartan theory. The matter content consists of a … WebNov 14, 2016 · 1) “Basics of Cartan Geometry”; 2) “Electrodynamics and Gravitation; 3) “ECE Theory and Beltrami Fields”; 4) “Photon Mass and …
WebApr 10, 2024 · arxiv.org Clifford's attempt to test his gravitation hypothesis Almost half a century before Einstein expounded his general theory of relativity, the English mathematician William Kingdon Clifford argued that space might not be Euclidean and proposed that... 1 1 5 Gro-Tsen @gro_tsen · 23h Replying to @gro_tsen … WebIn the 1920s, the French mathematician Élie Cartan formulated Einstein's theory in the language of bundles and connections, [1] a generalization of Riemannian geometry to which Cartan made important contributions.
In theoretical physics, the Einstein–Cartan theory, also known as the Einstein–Cartan–Sciama–Kibble theory, is a classical theory of gravitation similar to general relativity. The theory was first proposed by Élie Cartan in 1922. Einstein–Cartan theory is the simplest Poincaré gauge theory. See more Einstein–Cartan theory differs from general relativity in two ways: (1) it is formulated within the framework of Riemann–Cartan geometry, which possesses a locally gauged Lorentz symmetry, while … See more Singularity theorems which are premised on and formulated within the setting of Riemannian geometry (e.g. Penrose–Hawking singularity theorems) need not hold in Riemann–Cartan geometry. Consequently, Einstein–Cartan theory is able to … See more • Gronwald, F.; Hehl, F. W. (1996). "On the Gauge Aspects of Gravity". arXiv:gr-qc/9602013. • Hammond, Richard T (2002-03-27). "Torsion gravity". Reports on Progress in Physics. 65 (5): 599–649. Bibcode:2002RPPh...65..599H. doi:10.1088/0034-4885/65/5/201 See more The theory was first proposed by Élie Cartan in 1922 and expounded in the following few years. Albert Einstein became affiliated with the … See more The Einstein field equations of general relativity can be derived by postulating the Einstein–Hilbert action to be the true action of spacetime and then varying that action with respect to the … See more • Classical theories of gravitation • Metric-affine gravitation theory • Gauge theory gravity • Loop quantum gravity See more WebSep 29, 2014 · In the basic Einstein-Cartan theory, in which the antisymmetric part of the connection is taken as independent additional degrees of freedom, the torsion is non-dynamical: (apart from a surface term which does not contribute to the equations of motion).
WebJun 19, 2007 · As I understand it, Einstein-Cartan is just the extension of GR allowing for non-zero torsion and is derived from the same Hilbert-Einstein action, but taking the connection instead of the metric as dynamical variables. (might be slightly wrong here, this is what I'm trying to better understand) Anyway, it's a perfectly sound theory and the …
WebAn Eulerian variational principle for a spinning fluid in the Einstein-Cartan metric-torsion theory is presented. The variational principle yields the complete set of field equations for the system. The symmetric energy-momentum tensor is a sum of perfect-fluid term and a spin term. Authors: Ray, J R; Smalley, L L Publication Date: funeral services in hoveWebRecently, Shaposhnikov et al. [ 1] have investigated a metric-affine theory, alternative to general relativity, which is a generalization of the Einstein–Cartan theory of gravity (EC) [ 2 ]. This EC extension contains other invariants, besides the Ricci scalar in Riemann–Cartan spacetime, called Nieh–Yan and Host topological invariants. funeral services in newton le willowsWebAug 20, 2024 · Einstein-Cartan theory is not the minimal theory that explains the effects of GR. This is partly due to the fact that EC is GR whenever in spin-vacuum. It is … funeral services in bakersfieldWebarXiv.org e-Print archive funeral services in middletonWebEinstein asserts that a planned economy that adjusts to production would guarantee a livelihood to every member of society: In such an economy, the means of production are owned by society itself and are utilized in a planned fashion. girls in synthesis bandcampWebAnswer (1 of 3): Einstein-Cartan theory is a variation of General Relativity in which the affine connection is no longer presumed to be torsion-free. However, since we still have … funeral services for tyre nicholasgirls in synthesis the rest is distraction