Plane-fronted waves in metric-affine gravity
نویسندگان
چکیده
منابع مشابه
An exact plane-fronted wave solution in metric-affine gravity
We study plane–fronted electrovacuum waves in metric–affine gravity (MAG) with cosmological constant in the triplet ansatz sector of the theory. Their field strengths are, on the gravitational side, curvature Rα , nonmetricity Qαβ , torsion T α and, on the matter side, the electromagnetic field strength F . Here we basically present, after a short introduction into MAG and its triplet subcase, ...
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We describe plane-fronted waves in the Yang-Mills type quadratic metricaffine theory of gravity. The torsion and the nonmetricity are both nontrivial, and they do not belong to the triplet ansatz. PACS: 04.50.+h, 04.30.-w, 04.20.Jb.
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A general class of Lorentzian metrics, M0 ×R, 〈·, ·〉z = 〈·, ·〉x + 2 du dv + H (x, u) du2, with (M0, 〈·, ·〉x ) any Riemannian manifold, is introduced in order to generalize classical exact plane fronted waves. Here, we start a systematic study of their main geodesic properties: geodesic completeness, geodesic connectedness and multiplicity causal character of connecting geodesics. These results ...
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We consider spacetime to be a connected real 4-manifold equipped with a Lorentzian metric and an affine connection. The 10 independent components of the (symmetric) metric tensor and the 64 connection coefficients are the unknowns of our theory. We introduce an action which is quadratic in curvature and study the resulting system of Euler–Lagrange equations. In the first part of the paper we lo...
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There is a number of completely integrable gravity theories in two dimensions. We study the metric-affine approach on a 2-dimensional spacetime and display a new integrable model. Its properties are described and compared with the known results of Poincaré gauge gravity. PACS: 04.50.+h, 04.20.Fy, 04.20.Jb, 04.60.Kz, 02.30.Ik
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2000
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.62.044021