Zobrazeno 1 - 10
of 136
pro vyhledávání: '"V. D. Ivashchuk"'
Autor:
S. V. Bolokhov, V. D. Ivashchuk
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 7, Pp 1-13 (2022)
Abstract We consider a family of four-dimensional black hole solutions from Dehnen et al. (Grav Cosmol 9:153 arXiv:gr-qc/0211049 , 2003) governed by natural number $$q= 1, 2, 3 , \dots $$ q = 1 , 2 , 3 , ⋯ , which appear in the model with anisotrop
Externí odkaz:
https://doaj.org/article/5ef972fa246f41e7b80a31023f444104
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 5, Pp 1-12 (2021)
Abstract Quasinormal modes of massless test scalar field in the background of gravitational field for a non-extremal dilatonic dyonic black hole are explored. The dyon-like black hole solution is considered in the gravitational 4d model involving two
Externí odkaz:
https://doaj.org/article/ebdd1fbdba3b492c8d2d9e5f0da87af9
Autor:
K. K. Ernazarov, V. D. Ivashchuk
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 6, Pp 1-15 (2020)
Abstract We consider a D-dimensional Einstein-Gauss-Bonnet model with a cosmological term $$\Lambda $$ Λ and two non-zero constants: $$\alpha _1$$ α1 and $$\alpha _2$$ α2 . We restrict the metrics to be diagonal ones and study a class of solutions
Externí odkaz:
https://doaj.org/article/8281878a0090413a82f0c28190c54fcc
Publikováno v:
Symmetry, Vol 15, Iss 4, p 783 (2023)
We consider a 10-dimensional gravitational model with an SO(6)Yang–Mills field, Gauss–Bonnet term, and Λ term. We study so-called cosmological-type solutions defined on the product manifold M=R×R3×K, where K is 6d a Calabi–Yau manifold. By s
Externí odkaz:
https://doaj.org/article/e57822a5716e43e38f564898e4c2681a
Autor:
V. D. Ivashchuk, A. A. Kobtsev
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 10, Pp 1-9 (2019)
Abstract We study exact cosmological solutions in D-dimensional Einstein–Gauss–Bonnet model (with zero cosmological term) governed by two non-zero constants: $$\alpha _1$$ α1 and $$\alpha _2$$ α2 . We deal with exponential dependence (in time)
Externí odkaz:
https://doaj.org/article/122fdb29c6ad4af2947393ccb784f7f0
Autor:
V. D. Ivashchuk, A. A. Kobtsev
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 2, Pp 1-11 (2018)
Abstract A D-dimensional gravitational model with a Gauss–Bonnet term and the cosmological term $$\Lambda $$ Λ is studied. We assume the metrics to be diagonal cosmological ones. For certain fine-tuned $$\Lambda $$ Λ , we find a class of solution
Externí odkaz:
https://doaj.org/article/a5529263559346f097775c4236d7e48a
Autor:
S. V. Bolokhov, V. D. Ivashchuk
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 77, Iss 10, Pp 1-16 (2017)
Abstract A multidimensional generalization of Melvin’s solution for an arbitrary simple Lie algebra $${\mathcal {G}}$$ G is considered. The gravitational model in D dimensions, $$D \ge 4$$ D≥4 , contains n 2-forms and $$l \ge n$$ l≥n scalar fie
Externí odkaz:
https://doaj.org/article/98521c082be2427b8545f621f0b5bd85
Autor:
V. D. Ivashchuk
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 77, Iss 10, Pp 1-7 (2017)
Abstract A generalized Melvin solution for an arbitrary simple finite-dimensional Lie algebra $$\mathcal G$$ G is considered. The solution contains a metric, n Abelian 2-forms and n scalar fields, where n is the rank of $$\mathcal G$$ G . It is gover
Externí odkaz:
https://doaj.org/article/223d539d60664ef9a7d54cae596da65d
Autor:
K. K. Ernazarov, V. D. Ivashchuk
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 77, Iss 6, Pp 1-7 (2017)
Abstract We consider a D-dimensional gravitational model with a Gauss–Bonnet term and the cosmological term $$\Lambda $$ Λ . We restrict the metrics to diagonal cosmological ones and find for certain $$\Lambda $$ Λ a class of solutions with expon
Externí odkaz:
https://doaj.org/article/4415273222584eeeb59cbabcbc41e304
Autor:
K. K. Ernazarov, V. D. Ivashchuk
Publikováno v:
Symmetry, Vol 12, Iss 2, p 250 (2020)
A D-dimensional Einstein−Gauss−Bonnet model with a cosmological term Λ , governed by two non-zero constants: α 1 and α 2 , is considered. By restricting the metrics to diagonal ones, we study a class of solutions with the exponential time depe
Externí odkaz:
https://doaj.org/article/ea30f4192c734f07a7a0db1f6f5d6f9a