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pro vyhledávání: '"Cano, Pablo A"'
We provide the most complete analysis so far of quasinormal modes of rotating black holes in a general higher-derivative extension of Einstein's theory. By finding the corrections to the Teukolsky equation and expressing them in a simple form, we are
Externí odkaz:
http://arxiv.org/abs/2409.04517
In the vicinity of space-like singularities, general relativity predicts that the metric behaves, at each point, as a Kasner space which undergoes a series of "Kasner epochs" and "eras" characterized by certain transition rules. The period during whi
Externí odkaz:
http://arxiv.org/abs/2409.00648
Modifications to general relativity lead to effects in the spectrum of quasi-normal modes of black holes. In this paper, we develop a parametrized formalism to describe deviations from general relativity in the Teukolsky equation, which governs linea
Externí odkaz:
http://arxiv.org/abs/2407.15947
Autor:
Cano, Pablo A., David, Marina
Two universal predictions of general relativity are the propagation of gravitational waves of large momentum along null geodesics and the isospectrality of quasinormal modes in many families of black holes. In extensions of general relativity, these
Externí odkaz:
http://arxiv.org/abs/2407.12080
Autor:
Cano, Pablo A., David, Marina
We study gravitational perturbations on the near-horizon region of extremal and near-extremal rotating black holes in a general higher-derivative extension of Einstein gravity. We find a decoupled modified Teukolsky equation that rules the gravitatio
Externí odkaz:
http://arxiv.org/abs/2407.02017
Autor:
Zapata-Cano, Pablo H., Moreno-Rodríguez, Salvador, Amanatiadis, Stamatios, Alex-Amor, Antonio, Zaharis, Zaharias D., Molero, Carlos
In this paper, we study the dynamic formation of transients when plane waves impinge on a dispersive slab that abruptly changes its electrical properties in time. The time-varying slab alternates between air and metal-like states, whose frequency dis
Externí odkaz:
http://arxiv.org/abs/2406.18376
Autor:
Cano, Pablo A.
We show that there is a fundamental flaw in the application of modified gravity theories in cosmology, taking $f(R)$ gravity as a paradigmatic example. This theory contains a scalar degree of freedom that couples to the matter stress-energy tensor bu
Externí odkaz:
http://arxiv.org/abs/2404.01376
We show via an explicit construction how an infinite tower of higher-curvature corrections generically leads to a resolution of the Schwarzschild singularity in any spacetime dimension $D \ge 5$. The theories we consider have two key properties that
Externí odkaz:
http://arxiv.org/abs/2403.04827
As shown in the classic work of Belinski, Khalatnikov and Lifshitz, the approach to a generic space-like singularity in general relativity consists of a sequence of eras and epochs in which the metric is locally Kasner, connected by brief transitions
Externí odkaz:
http://arxiv.org/abs/2402.14912
Autor:
Cano, Pablo A., David, Marina
Higher-derivative corrections in the AdS/CFT correspondence allow us to capture finer details of the dual CFT and to explore the holographic dictionary beyond the infinite N and strong coupling limits. Following an effective field theory approach, we
Externí odkaz:
http://arxiv.org/abs/2402.02215