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arXiv 2004.00009gr-qchep-th
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标量Gauss-Bonnet引力中的数值相对论:小耦合极限之外的3+1分解

Towards numerical relativity in scalar Gauss-Bonnet gravity: 3+1 decomposition beyond the small-coupling limit

Helvi Witek, Leonardo Gualtieri, Paolo Pani

摘要:

标量Gauss-Bonnet引力理论是唯一对广义相对论进行二次曲率修正的理论,其场方程是二阶微分方程。该理论允许非微扰动力学修正,因此是强曲率区域中超越广义相对论效应的最引人注目的案例研究之一。然而,具有二阶场方程并不能保证在通用配置中健康的时间演化。作为第一步,在这个理论中不断发展的黑洞双星,我们在这里推导出任何(不一定很小)耦合常数的场方程的3+1分解,我们讨论其实施的潜在挑战。

英文摘要:

Scalar Gauss-Bonnet gravity is the only theory with quadratic curvature corrections to general relativity whose field equations are of second differential order. This theory allows for nonperturbative dynamical corrections and is therefore one of the most compelling case studies for beyond-general relativity effects in the strong-curvature regime. However, having second-order field equations is not a guarantee for a healthy time evolution in generic configurations. As a first step towards evolving black-hole binaries in this theory, we here derive the 3+1 decomposition of the field equations for any (not necessarily small) coupling constant and we discuss potential challenges of its implementation.

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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