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arXiv 2402.04503gr-qchep-th
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一阶引力形式中具有共形耦合标量场的渐近AdS黑洞

Asymptotically AdS black hole with a conformally-coupled scalar field in the first-order formalism of gravity

L. Avilés, C. Corral, F. Izaurieta, O. Valdivia, C. Vera

AI总结:

本研究在四维一阶引力形式中,通过共形变换的单参数延拓,解析得到带共形耦合标量场的新型渐近AdS静态黑洞解,该解含非平凡挠率且标量场处处正则,挠率为零时可连续过渡到已知解。

摘要:

我们在四维一阶引力形式中,提出了一种带有共形耦合标量场的新型渐近反德西特(anti-de Sitter)黑洞解。为此,我们利用标架(vielbein)和自旋联络被视为独立场的事实,考虑共形变换的单参数延拓。我们解析求解了场方程,得到了一个静态黑洞解,该解具有由标量场与几何之间的共形耦合所产生的非平凡挠率。挠率的存在使得标量场在各处都保持正则,而曲率奇点和挠率奇点则合并在原点处。我们证明,在挠率趋于零的极限下,该构型与此前报道的解连续相连,并分析了其主要性质,重点关注挠率奇点带来的影响。

英文摘要:

We present a novel asymptotically anti-de Sitter black hole solution with conformally-coupled scalar fields in the first-order formalism of gravity in four dimensions. To do so, we consider a one-parameter extension of conformal transformations by exploiting the fact that the vielbein and spin connection are regarded as independent fields. We solve the field equations analytically and obtain a static black hole solution with nontrivial torsion sourced by the conformal coupling between the scalar field and geometry. The presence of torsion renders the scalar field everywhere regular, while the curvature and torsion singularities coalesce into the origin. We show that this configuration is continuously connected to previously reported solutions in the limit of vanishing torsion and analyze its main properties, focusing on the consequences of the torsional singularity.

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