Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Osetrin, Evgeny"'
Publikováno v:
Universe, 2023, Volume 9, Issue 8, 356
Exact models of primordial gravitational waves in the Bianchi type III universe are constructed on the basis of the quadratic theory of gravity with a scalar field and pure radiation in Shapovalov wave spacetimes of type II (subtype 2). Exact solutio
Externí odkaz:
http://arxiv.org/abs/2306.10605
Publikováno v:
Symmetry, 2022, 14(12), 2636
Exact solutions for Shapovalov wave spacetimes of type I in the scalar-tensor theory of gravity of Brans-Dicke are constructed. Shapovalov's wave spacetimes describe gravitational-wave models that allow the separation of wave variables in privileged
Externí odkaz:
http://arxiv.org/abs/2210.17379
Publikováno v:
Symmetry, 2023, 15(7), 1455
For gravitational-wave spacetimes of Shapovalov type III, exact general solutions of geodesic deviation equations and equations of motion of test particles are obtained. Solutions are found in a privileged coordinate system, where the metric of the c
Externí odkaz:
http://arxiv.org/abs/2210.04063
Publikováno v:
Journal of Physics A: Mathematical and Theoretical, 2023, 56(32), 325205
For the Bianchi type VI universe, exact solutions of the equation of geodesic deviation in a strong primordial gravitational wave in a privileged coordinate system are obtained. The solutions refer to Shapovalov's gravitational-wave models of spaceti
Externí odkaz:
http://arxiv.org/abs/2209.08589
Publikováno v:
Eur. Phys. J. C 82, 894 (2022)
For the gravitational wave model based on the type III Shapovalov wave space-time, test particle trajectories and the exact solution of geodesic deviation equations for the Bianchi type VII universe are obtained. Based on the found 4-vector of deviat
Externí odkaz:
http://arxiv.org/abs/2206.15234
Publikováno v:
Journal of Mathematical Physics, 2021, 62(9),092501
Presented are exactly integrable models with pure radiation in R^2 gravity with a cosmological constant, related to wave-like Shapovalov spacetimes type II. Spatially homogeneous models of Shapovalov spaces were considered. The obtained solutions bel
Externí odkaz:
http://arxiv.org/abs/2012.08470
Autor:
Osetrin, Konstantin, Osetrin, Evgeny
Publikováno v:
SYMMETRY-BASEL, 12 (2020), 8, 1372
A complete classification of space-time models is presented, which admit the privileged coordinate systems, where the Hamilton-Jacobi equation for a test particle is integrated by the method of complete separation of variables with separation of the
Externí odkaz:
http://arxiv.org/abs/2007.11359
Publikováno v:
International Journal of Geometric Methods in Modern Physics, 2020
All classes of spatially homogeneous space-time models in the generalized scalar-tensor theory of gravity are found that allow the integration of the equations of motion of test particles and the eikonal equation by the method of %complete separation
Externí odkaz:
http://arxiv.org/abs/2005.02616
All classes of spatially homogeneous space-time models are found that allow the integration of the equations of motion of test particles and the eikonal equation by the method of complete separation of variables according to type (2.1). Four classes
Externí odkaz:
http://arxiv.org/abs/2003.11020
Autor:
Osetrin, Evgeny, Osetrin, Konstantin
Publikováno v:
Journal of Mathematical Physics 58, 112504 (2017)
We consider space-time models with pure radiation, which admit integration of the eikonal equation by the method of separation of variables. For all types of these models, the equations of the energy-momentum conservation law were integrated. The res
Externí odkaz:
http://arxiv.org/abs/1709.01718