Results 11 to 20 of about 1,975 (257)
Homogeneous and anisotropic universe models with bouncing deceleration parameter in $f(R,T)$ theory
Journal of New Results in Science, 2023 In this study, we have investigated the cloud of string with perfect fluid (CSPF) matter distribution for the homogeneous and anisotropic (Bianchi I, III, and Kantowski-Sachs) universe models in the $f(R,T)$ theory.
Aysel Kızılcık, Can Aktaş
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Metric algebroid and Dirac generating operator in Double Field Theory
Journal of High Energy Physics, 2020 We give a formulation of Double Field Theory (DFT) based on a metric algebroid. We derive a covariant completion of the Bianchi identities, i.e. the pre-Bianchi identity in torsion and an improved generalized curvature, and the pre-Bianchi identity ...
Ursula Carow-Watamura +3 more
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Metric anisotropies and nonequilibrium attractor for expanding plasma
Physics Letters B, 2023 We consider the evolution of a system of chargeless and massless particles in an anisotropic space-time given by the Bianchi type I metric. Specializing to the axis-symmetric case, we derive the framework of anisotropic hydrodynamics from the Boltzmann ...
Nisarg Vyas +2 more
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European Physical Journal C: Particles and Fields, 2021 We construct new classes of cosmological solution to the five dimensional Einstein–Maxwell-dilaton theory, that are non-stationary and almost conformally regular everywhere.
Bardia H. Fahim, Masoud Ghezelbash
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Vacuum polarization of scalar field on Lie groups with Bi-invariant metric [PDF]
Компьютерные исследования и моделирование, 2015 We consider vacuum polarization of a scalar field on the Lie groups with a bi-invariant metric of Robertson-Walker type. Using the method of orbits we found expression for the vacuum expectation values of the energy-momentum tensor of the scalar field ...
Alexander Igorevich Breev +1 more
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Scalar-flat Kähler metrics with conformal Bianchi V symmetry [PDF]
Classical and Quantum Gravity, 2011 Dedicated to Maciej Przanowski on the occasion of his 65th birthday. Minor corrections.
Dunajski, Maciej, Plansangkate, Prim
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Bianchi Type-I Anisotropic Universe with Metric Potential in Saez-Ballester Theory of Gravitation
Journal of Applied Mathematics and Physics, 2022 exaly +2 more sources
Self-dual Bianchi metrics and the Painlevé transcendents
Classical and Quantum Gravity, 1994 Summary: We give two constructions that relate the self-duality condition on the Weyl curvature of a spacetime with Bianchi \(IX\) symmetry to the Painlevé equations, the first by way of the self-dual Yang-Mills equation, the second by way of the isomonodromy problem.
Maszczyk, R, Mason, L, Woodhouse, N
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Integrable geodesic flows and multi-centre versus Bianchi A metrics [PDF]
Classical and Quantum Gravity, 2006 22 pages, latex2e, no ...
Valent, Galliano, Ben Yahia, Hamed
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DFT in supermanifold formulation and group manifold as background geometry
Journal of High Energy Physics, 2019 We develop the formulation of DFT on pre-QP-manifold. The consistency conditions like section condition and closure constraint are unified by a weak master equation. The Bianchi identities are also characterized by the pre-Bianchi identity.
Ursula Carow-Watamura +3 more
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