Tag: Black Holes and Theoretical Physics
Kerr-de Sitter black holes show stronger repetitive energy return
What the study found The study found that, compared with a Kerr black hole, a Kerr-de Sitter black hole can produce higher energy return on investment (EROI) and higher single-extraction energy capability in the repetitive Penrose process. The results also depend on the cosmological parameter and the decay radius. Why the authors say this matters…
Weak gravity bound extended to AdS settings
What the study found The authors extend a recent proposal for the Weak Gravity Conjecture (WGC) in anti-de Sitter (AdS) space to more general effective field theories. They report that, when moduli are present, the relevant condition is that a particle produced by Schwinger effect during an extremal black hole decay is repelled close to…
Curvature shapes chiral transport and entanglement in fermions
What the study found The study found that spacetime curvature in AdS2 and AdS2 black hole backgrounds can produce strongly asymmetric, or chiral, wave propagation for Dirac fermions. The authors report that this propagation is confined within an inhomogeneous Lieb-Robinson cone, a bound on how fast information spreads in a system. Why the authors say…
Lorentz violation changes black hole disk images and polarization
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in AstrophysicsObservable signatures of Lorentz violation in Hořava gravity revealed through black hole accretion disk images and polarization patterns, testable with future Event Horizon Telescope observations.
Separability of gravitational wave equations in rotating black hole geometries
Analytical study of gravitational wave propagation in Myers-Perry higher-dimensional rotating black holes using separation of variables techniques to derive explicit solutions.
