Magnetic reconnection enables higher energy extraction efficiency from singly-rotating five-dimensional Kerr black holes than from doubly-rotating ones and can exceed the Blandford-Znajek process in the single-rotation case.
Magnetic reconnection and energy extraction from a spinning black hole with broken Lorentz symmetry
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Energy extraction efficiency via Comisso-Asenjo reconnection in N=2 U(1)^2 gauged supergravity black holes exceeds the Kerr limit (η>1.495) for certain parameter combinations at lower spins.
In a Kerr-Sen-like spacetime from Bumblebee gravity, increasing the Lorentz symmetry breaking rate and Bumblebee charge enlarges the allowed region for energy extraction via magnetic reconnection and moves it closer to the horizon, with peak efficiency when cosmic censorship is marginally violated.
Quadratic f(Q) gravity adds an H^4 term to the Friedmann equation and introduces a time-dependent G_eff that suppresses linear growth and halo abundance, offering a modified-gravity route to easing the S8 tension.
citing papers explorer
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Magnetic reconnection in five-dimensional Kerr black hole
Magnetic reconnection enables higher energy extraction efficiency from singly-rotating five-dimensional Kerr black holes than from doubly-rotating ones and can exceed the Blandford-Znajek process in the single-rotation case.
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Comisso-Asenjo Mechanism in Rotating $\mathcal{N}=2,U(1)^2$ Gauged Supergravity Black Holes: Extended Comparison With Kerr Black Hole
Energy extraction efficiency via Comisso-Asenjo reconnection in N=2 U(1)^2 gauged supergravity black holes exceeds the Kerr limit (η>1.495) for certain parameter combinations at lower spins.
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Energy extraction from a rotating black hole via magnetic reconnection: Bumblebee gravity
In a Kerr-Sen-like spacetime from Bumblebee gravity, increasing the Lorentz symmetry breaking rate and Bumblebee charge enlarges the allowed region for energy extraction via magnetic reconnection and moves it closer to the horizon, with peak efficiency when cosmic censorship is marginally violated.
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Late-Time Cosmology and Structure Formation in Quadratic $f(Q)$ Gravity
Quadratic f(Q) gravity adds an H^4 term to the Friedmann equation and introduces a time-dependent G_eff that suppresses linear growth and halo abundance, offering a modified-gravity route to easing the S8 tension.