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pro vyhledávání: '"R. Mu"'
In the framework of Simpson-Visser, the search for field sources that produce black bounces in alternative gravity theories has remained unresolved. In this paper, the first in a series exploring sources for alternative theories of gravity, we identi
Externí odkaz:
http://arxiv.org/abs/2409.12101
Autor:
Peng, Jun-Jin, Li, Hua
In this paper, we aim to perform a systematical investigation on the field equations and Noether potentials for the higher-order gravity theories endowed with Lagrangians depending on the metric and the Riemann curvature tensor, together with $i$th (
Externí odkaz:
http://arxiv.org/abs/2402.17429
Autor:
Abdalaoui, el Houcein el, Lin, Michael
Let $T$ be the Koopman operator of a measure preserving transformation $\theta$ of a probability space $(X,\Sigma,\mu)$. We study the convergence properties of the averages $M_nf:=\frac1n\sum_{k=0}^{n-1}T^kf$ when $f \in L^r(\mu)$, $0
Externí odkaz:
http://arxiv.org/abs/2401.00567
Autor:
Sadeghi, Mehdi
In this paper, we study the holographic dual to an asymptotically anti-de Sitter black brane in an Einstein-Yang-Mills model with a non-minimal coupling between the Riemann and Yang-Mills fields. First, we construct a planar black hole solution of th
Externí odkaz:
http://arxiv.org/abs/2210.06584
In the framework of the mimetic approach, we study the $f(R,R_{\mu\nu}R^{\mu\nu})$ gravity with the Lagrange multiplier constraint and the scalar potential. We introduce field equations for the discussed theory and overview their properties. By using
Externí odkaz:
http://arxiv.org/abs/2105.05050
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We show that in the quadratic curvature theory of gravity, or simply $R_{\mu \nu} ^2$ gravity, the tree-level unitariy bound (tree unitarity) is violated in the UV region but an analog for $S$-matrix unitarity ($SS^{\dagger} = 1$) is satisfied. This
Externí odkaz:
http://arxiv.org/abs/2012.01717
Publikováno v:
International Journal of Geometric Methods in Modern Physics, Vol. 17, No. 01, 2050008 (2020)
Dynamical behavior and future singularities of $f(R, T,R_{\mu\nu}T^{\mu\nu})$ gravitational theory are investigated. This gravitational model is a more complete form of the $f(R,T)$ gravity which can offer new dynamics for the universe. We investigat
Externí odkaz:
http://arxiv.org/abs/2004.01265
Autor:
Feng, Haiyuan, Yang, Rong-Jia
Publikováno v:
Chin.Phys.C 44 (2020) 11, 115101
We investigate whether the new horizon first law still holds in $f(R,R^{\mu\nu}R_{\mu\nu})$ theory. For this complicated theory, we first determine the entropy of black hole via Wald method, then we derive the energy by using the new horizon first la
Externí odkaz:
http://arxiv.org/abs/1910.05747
Akademický článek
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