Zobrazeno 1 - 10
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pro vyhledávání: '"Dubinský, P"'
Autor:
Dubinsky, Alexey
While grey-body factors for a test scalar field in stringy black holes described by the renowned Gibbons-Maeda-Garfinkle-Horowitz-Strominger (GMGHS) solution have been analyzed in the literature, no such analysis exists for gravitons, likely due to t
Externí odkaz:
http://arxiv.org/abs/2412.00625
In light of the recently discovered connection between grey-body factors and quasinormal ringing, we derive analytic expressions for the grey-body factors of generic parametrized spherically symmetric and asymptotically flat black holes. These expres
Externí odkaz:
http://arxiv.org/abs/2410.15232
Autor:
Dubinsky, Alexey
Using an expansion in terms of the inverse multipole number and the WKB approach, we derive an analytic expression for generic parametrized spherically symmetric and asymptotically flat black holes described by the Rezzolla-Zhidenko spacetime, in the
Externí odkaz:
http://arxiv.org/abs/2409.16569
Autor:
Dubinsky, Alexey
Quantum gravitational corrections to the entropy of the Schwarzschild black hole, derived using the Wald entropy formula within an effective field theory framework, were presented in [X. Calmet, F. Kuipers Phys.Rev.D 104 (2021) 6, 066012]. These corr
Externí odkaz:
http://arxiv.org/abs/2405.13552
Autor:
Dubinsky, Alexey
Publikováno v:
Physics of the Dark Universe, 46 (2024) 101657
We calculate quasinormal modes of scalar and neutrino perturbations around the charged black hole in Asymptotically Safe Gravity. We show that the charge and coupling constant change the quasinormal spectrum considerably. We show that previous calcul
Externí odkaz:
http://arxiv.org/abs/2405.08262
Autor:
Dubinsky, Alexey
Publikováno v:
Modern Physics Letters A 2024 39:21n22, 2450108
We show that first several overtones could calculated by the time-domain integration method for asymptotically de Sitter black holes already at the lowest multipole numbers of gravitational and electromagnetic perturbations. This is not possible for
Externí odkaz:
http://arxiv.org/abs/2404.18004
Minimum spanning trees are important tools in the analysis and design of networks. Many practical applications require their computation, ranging from biology and linguistics to economy and telecommunications. The set of cycles of a network has a vec
Externí odkaz:
http://arxiv.org/abs/2404.17428
Spanning trees are fundamental objects in graph theory. The spanning tree set size of an arbitrary graph can be very large. This limitation discourages its analysis. However interesting patterns can emerge in small cases. In this article we introduce
Externí odkaz:
http://arxiv.org/abs/2404.16878
Autor:
Dubinsky, Alexey, Zinhailo, Antonina
We study the decay of Dirac and massive scalar fields at asymptotically late times in the background of the charged asymptotically de Sitter dilatonic black holes. It is shown that the asymptotic decay is exponential and oscillatory for large and int
Externí odkaz:
http://arxiv.org/abs/2404.01834
Autor:
Dubinsky, Alexey
Publikováno v:
EPL 147 19003 (2024)
We examine perturbations of a massive scalar field around spherically symmetric, brane-localized black holes. Although the ringdown and asymptotic tails of various brane-world black holes have been extensively studied, there has been no analysis of t
Externí odkaz:
http://arxiv.org/abs/2403.01883