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Topological deformation of isolated horizons

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arxiv 0705.1518 v6 pith:H4PN7MQU submitted 2007-05-10 gr-qc

classification gr-qc
keywords blackblack-holeholetermacquirescertaincharacteristicconstant
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We show that the Gauss-Bonnet term can have physical effects in four dimensions. Specifically, the entropy of a black hole acquires a correction that is proportional to the Euler characteristic of the cross sections of the horizon. While this term is constant for a single black hole, it will be a non-trivial function for a system with dynamical topologies such as black-hole mergers: it is shown that for certain values of the GB parameter, the second law of black-hole mechanics can be violated.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Early- and late-time constraints on Wald-Gauss-Bonnet topological dark energy and implications for the $H_0$ and $S_8$ tensions

    gr-qc 2026-07 conditional novelty 6.0 of 10

    A joint CMB, BAO, and supernova fit mildly prefers a non-zero Wald-Gauss-Bonnet dark-energy term (~3σ with SH0ES included), raising H0 from 68.5 to 69.8 km/s/Mpc and easing the Hubble tension by ~0.9σ at the cost of a...

  2. Topological dark energy from black-hole formations and mergers through the gravity-thermodynamics approach

    gr-qc 2024-12 reject novelty 5.0 of 10

    Black hole formation and merger, through topology changes of the cosmic apparent horizon, generate an effective dark energy whose equation of state is phantom-like or quintessence-like depending on the sign of the Gau...

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