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arXiv 2403.08705gr-qc
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固定方程方法中标量 Gauss-Bonnet 理论中孤立黑洞的标量化

Scalarization of isolated black holes in scalar Gauss-Bonnet theory in the fixing-the-equations approach

Guillermo Lara, Harald P. Pfeiffer, Nikolas A. Wittek, Nils L. Vu, Kyle C. Nelli, Alexander Carpenter, Geoffrey Lovelace, Mark A. Scheel, William Throwe

AI总结:

本文在固定方程方法框架下扩展 SpECTRE 代码,演化退耦极限下的标量 Gauss-Bonnet 理论,提出新驱动方程以改进孤立黑洞自发标量化稳态解的恢复,并通过与原始理论对比验证解的准确性。

摘要:

在广义相对论之外的理论中进行数值演化最有前景的途径之一是固定方程方法,该方法通过在演化方程中添加新的“驱动”方程,使得数值演化能够稳定进行。在此方向上,我们将数值相对论代码 SpECTRE 扩展,以在退耦极限下演化标量 Gauss-Bonnet 理论的“固定”版本,该理论是一个现象学上有趣的理论,允许在真空中存在带毛黑洞解。我们聚焦于孤立黑洞系统,包括具有和不具有线动量及角动量的情况,并提出一个新的驱动方程以改进此类稳态解的恢复。我们通过使用不同驱动方程数值演化发生自发标量化的黑洞,展示了该新驱动方程的有效性。最后,我们通过与原始未修改理论的结果进行比较,评估所得解的准确性。

英文摘要:

One of the most promising avenues to perform numerical evolutions in theories beyond General Relativity is the fixing-the-equations approach, a proposal in which new ``driver'' equations are added to the evolution equations in a way that allows for stable numerical evolutions. In this direction, we extend the numerical relativity code SpECTRE to evolve a ``fixed'' version of scalar Gauss-Bonnet theory in the decoupling limit, a phenomenologically interesting theory that allows for hairy black hole solutions in vacuum. We focus on isolated black hole systems both with and without linear and angular momentum, and propose a new driver equation to improve the recovery of such stationary solutions. We demonstrate the effectiveness of the latter by numerically evolving black holes that undergo spontaneous scalarization using different driver equations. Finally, we evaluate the accuracy of the obtained solutions by comparing with the original unaltered theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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