Results 41 to 50 of about 681 (164)
D-dimensional charged Anti-de-Sitter black holes in f (T) gravity
Journal of High Energy Physics, 2017 We present a D-dimensional charged Anti-de-Sitter black hole solutions in f (T) gravity, where f (T) = T + βT 2 and D ≥ 4. These solutions are characterized by flat or cylindrical horizons.
A.M. Awad, S. Capozziello, G.G.L. Nashed
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Supersymmetric traversable wormholes
Journal of High Energy Physics, 2020 We study traversable wormhole solutions in pure gauged N = 2 supergravity with and without electromagnetic fields, which are locally isometric under SO(2, 1) × SO(1, 1). The model allows for 1/2-BPS wormhole solutions whose corresponding globally defined
Andrés Anabalón +2 more
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Geodesically complete black holes in Lorentz-violating gravity
Journal of High Energy Physics, 2022 We present a systematic study of the geometric structure of non-singular spacetimes describing black holes in Lorentz-violating gravity. We start with a review of the definition of trapping horizons, and the associated notions of trapped and marginally ...
Raúl Carballo-Rubio +3 more
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Engineering Topological Phases with a Traveling‐Wave Spacetime Modulation
Laser &Photonics Reviews, EarlyView.Time‐varying systems have garnered considerable attention due to their unique potential in manipulating electromagnetic waves. Here, a novel class of topological spacetime crystals with a traveling‐wave modulation is introduced. By manipulating material anisotropy, one can engineer light angular momentum and non‐trivial topological phases characterized
João C. Serra, Mário G. Silveirinha
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THE NATURE OF SPACETIME SINGULARITIES [PDF]
, 2005 Submitted to 100 Years of Relativity - Space-Time Structure: Einstein and Beyond, A. Ashtekar (ed.)
openaire +3 more sources
Deforming black holes with even multipolar differential rotation boundary
Journal of High Energy Physics, 2019 Motivated by the novel asymptotically global AdS4 solutions with deforming horizon in [21], we analyze the boundary metric with even multipolar differential rotation and numerically construct a family of deforming solutions with quadrupolar differential ...
Hong-Bo Li +4 more
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Generalized quasi‐geostrophic equation in critical Lorentz–Besov spaces, based on maximal regularity
Mathematische Nachrichten, EarlyView.Abstract We consider the quasi‐geostrophic equation with its principal part (−Δ)α${(-\mathrm{\Delta})^{\alpha}}$ for α>1/2$\alpha >1/2$ in Rn$\mathbb {R}^n$ with n≥2$n \ge 2$. We show that for every initial data θ0∈Ḃr,q1−2α+nr$\theta _0 \in \dot{B}^{1-2\alpha + \frac{n}{r}}_{r, q}$ with 1
Hideo Kozono +2 more
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Taming singularities and chaos in conformal gravity
European Physical Journal C: Particles and FieldsWe hereby address the cosmological singularity problem in a general gravitational theory invariant under Weyl conformal transformations. In particular, we focus on the Bianchi IX spacetime and we show that both the initial (big bang) and final (big ...
Jiale Gu, Leonardo Modesto, Cosimo Bambi
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Do black holes create polyamory?
Journal of High Energy Physics, 2018 Of course not, but if one believes that information cannot be destroyed in a theory of quantum gravity, then we run into apparent contradictions with quantum theory when we consider evaporating black holes.
Andrzej Grudka +5 more
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Mathematical Methods in the Applied Sciences, EarlyView.ABSTRACT Consider wave equations with time derivative nonlinearity and time‐dependent propagation speed which are generalized versions of the wave equations in the Friedmann–Lemaître–Robertson–Walker (FLRW) spacetime, the de Sitter spacetime and the anti‐de Sitter space time.
Kimitoshi Tsutaya, Yuta Wakasugi
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