On the entropy of a stealth vector-tensor black hole

IF 4.2 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

The European Physical Journal C Pub Date : 2024-11-15 DOI:10.1140/epjc/s10052-024-13536-5

Javier Chagoya, I. Díaz-Saldaña, J. C. López-Domínguez, C. Martínez-Robles

引用次数: 0

Abstract

We apply Wald’s formalism to a Lagrangian within generalised Proca gravity that admits a Schwarzschild black hole with a non-trivial vector field. The resulting entropy differs from that of the same black hole in General Relativity by a logarithmic correction modulated by the only independent charge of the vector field. We find conditions on this charge to guarantee that the entropy is a non-decreasing function of the black hole area, as is the case in GR. If this requirement is extended to black hole mergers, we find that for Planck scale black holes, a non-decreasing entropy is possible only if the area of the final black hole is several times larger than the initial total area of the merger. Finally, we discuss some implications of the vector Galileon entropy from the point of view of entropic gravity.

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论隐形矢量张量黑洞的熵

我们将沃尔德形式主义应用于广义普罗卡引力中的拉格朗日，该引力允许一个具有非三维矢量场的施瓦兹柴尔德黑洞。得出的熵与广义相对论中相同黑洞的熵不同，其对数修正受矢量场唯一独立电荷的调制。我们找到了这个电荷的条件，以保证熵是黑洞面积的非递减函数，就像广义相对论中的情况一样。如果把这一要求扩展到黑洞合并，我们会发现对于普朗克尺度的黑洞，只有当最终黑洞的面积比合并时的初始总面积大几倍时，熵才有可能不递减。最后，我们从熵引力的角度讨论了矢量伽利略熵的一些含义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The European Physical Journal C 物理-物理：粒子与场物理

CiteScore

8.10

自引率

15.90%

发文量

1008

审稿时长

2-4 weeks

期刊介绍： Experimental Physics I: Accelerator Based High-Energy Physics Hadron and lepton collider physics Lepton-nucleon scattering High-energy nuclear reactions Standard model precision tests Search for new physics beyond the standard model Heavy flavour physics Neutrino properties Particle detector developments Computational methods and analysis tools Experimental Physics II: Astroparticle Physics Dark matter searches High-energy cosmic rays Double beta decay Long baseline neutrino experiments Neutrino astronomy Axions and other weakly interacting light particles Gravitational waves and observational cosmology Particle detector developments Computational methods and analysis tools Theoretical Physics I: Phenomenology of the Standard Model and Beyond Electroweak interactions Quantum chromo dynamics Heavy quark physics and quark flavour mixing Neutrino physics Phenomenology of astro- and cosmoparticle physics Meson spectroscopy and non-perturbative QCD Low-energy effective field theories Lattice field theory High temperature QCD and heavy ion physics Phenomenology of supersymmetric extensions of the SM Phenomenology of non-supersymmetric extensions of the SM Model building and alternative models of electroweak symmetry breaking Flavour physics beyond the SM Computational algorithms and tools...etc.