Results 21 to 30 of about 3,220 (254)
SciPost Physics, 2021 We study the Killing vectors of the quantum ground-state manifold of a parameter-dependent Hamiltonian. We find that the manifold may have symmetries that are not visible at the level of the Hamiltonian and that different quantum phases of matter ...
Diego Liska, Vladimir Gritsev
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Cosmic acceleration and geodesic deviation in chameleon scalar field model
European Physical Journal C: Particles and Fields, 2022 While considering the chameleon scalar field model with the spatially flat FLRW background, we investigate the late-time acceleration phase of the universe, wherein we apply the typical potential usually used in this model.
Raziyeh Zaregonbadi +2 more
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Geodesic Mappings of Semi-Riemannian Manifolds with a Degenerate Metric
Mathematics, 2022 This article introduces the concept of geodesic mappings of manifolds with idempotent pseudo-connections. The basic equations of canonical geodesic mappings of manifolds with completely idempotent pseudo-connectivity and semi-Riemannian manifolds with a ...
Igor G. Shandra, Josef Mikeš
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Periodic geodesics and geometry of compact Lorentzian manifolds with a Killing vector field [PDF]
Mathematische Zeitschrift, 2009 11 ...
Flores, José Luis +2 more
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Geodesic and Conformally Reeb Vector Fields on Flat 3-Manifolds
SSRN Electronic Journal, 2022 19 pages, 6 figures V2: Minor corrections, added remark following Theorem 1.
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Geodesic orbit and weakly symmetric spray manifolds
Comptes Rendus. MathématiqueIn this paper, we introduce the geodesic orbit and weakly symmetric properties in homogeneous spray geometry. When a homogeneous spray manifold is endowed with a reductive decomposition, we use the spray vector field to describe these properties, and ...
Xu, Xiyun, Xu, Ming
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Lightlike Submanifolds of a Semi-Riemannian Manifold of Quasi-Constant Curvature
Journal of Applied Mathematics, 2012 We study the geometry of lightlike submanifolds (𝑀,𝑔,𝑆(𝑇𝑀),𝑆(𝑇𝑀⟂)) of a semi-Riemannian manifold (𝑀,̃𝑔) of quasiconstant curvature subject to the following conditions: (1) the curvature vector field ζ of 𝑀 is tangent to 𝑀, (2) the screen distribution 𝑆(
D. H. Jin, J. W. Lee
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Isometries and the double copy
Journal of High Energy Physics, 2023 In the standard derivation of the Kerr-Schild double copy, the geodicity of the Kerr-Schild vector and the stationarity of the spacetime are presented as assumptions that are necessary for the single copy to satisfy Maxwell’s equations.
Damien A. Easson +3 more
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Modified Naiver-Stokes equation for conceptual tests of pure field physics
EPJ Web of Conferences, 2018 Cartesian relativistic physics has its own nondual analog of the 1915 Einstein Equation for pure field physics in nonempty space. This tensor field analog leads to the vector geodesic equations for relativistic accelerations of Ricci material densities ...
Bulyzhenkov Igor E.
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Kähler metrics via Lorentzian Geometry in dimension four
Complex Manifolds, 2019 Given a semi-Riemannian 4-manifold (M, g) with two distinguished vector fields satisfying properties determined by their shear, twist and various Lie bracket relations, a family of Kähler metrics gK is constructed, defined on an open set in M, which ...
Aazami Amir Babak, Maschler Gideon
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