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pro vyhledávání: '"Davydov, E. A."'
Gravitational shockwaves are geometries where components of the transverse curvature have abrupt behaviour across null hypersurfaces, which are fronts of the waves. We develop a general approach to describe classical field theories on such geometries
Externí odkaz:
http://arxiv.org/abs/2408.05142
Null cosmic strings are shown to disturb gravitational fields of massive bodies and create outgoing gravitational waves (GW). Perturbations of the metric caused by a straight null string and a point-like massive source are found as solutions to linea
Externí odkaz:
http://arxiv.org/abs/2311.01863
A straightforward application of the variational principle to null strings meets difficulties since string's world-sheets are degenerate. It is known that the variational principle in this case can be formulted with the help of two-vector density on
Externí odkaz:
http://arxiv.org/abs/2210.09891
Equations of motion of null cosmic strings near black holes, or other massive sources, are solved exactly in the weak field approximation. The stress-energy tensor of a null string in a curved spacetime is introduced and used to show how scattering b
Externí odkaz:
http://arxiv.org/abs/2203.02673
Autor:
Davydov, E. A.
We show that there are two classes of solutions that describe static spherically symmetric dyonic dilaton black holes with two nonsingular horizons. The first class includes only the already known solutions that exist for a few special values of the
Externí odkaz:
http://arxiv.org/abs/1711.04198
Autor:
Davydov, E. A.
We compare cosmologic and spherically symmetric solutions to metric and Palatini versions of vector Horndeski theory. It appears that Palatini formulation of the theory admits more degrees of freedom. Specifically, homogeneous isotropic configuration
Externí odkaz:
http://arxiv.org/abs/1708.09796
Akademický článek
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Autor:
Davydov, E., Gal'tsov, D.
Publikováno v:
Physics Letters B (2016) pp. 622-628
We propose new mechanism for inflation using classical SU(2) Yang-Mills (YM) homogeneous and isotropic field non-minimally coupled to gravity via Horndeski prescription. This is the unique generally and gauge covariant ghost-free YM theory with the c
Externí odkaz:
http://arxiv.org/abs/1512.02164
Autor:
Davydov, E. A., Filippov, A. T.
Nowadays it is widely accepted that the evolution of the universe was driven by some scalar degrees of freedom both on its early stage and at present. The corresponding cosmological models often involve some scalar fields introduced ad hoc. In this p
Externí odkaz:
http://arxiv.org/abs/1302.6969
Autor:
Gal'tsov, D. V., Davydov, E. A.
We discuss homogeneous and isotropic cosmological models driven by SU(2) gauge fields in the framework of Einstein gravity. There exists a Yang-Mills field configuration, parametrized by a single scalar function, which consists of parallel electric a
Externí odkaz:
http://arxiv.org/abs/1112.2943