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arXiv 1507.08261gr-qchep-thnlin.CD
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AdS中的稳定岛和递归时间

Islands of stability and recurrence times in AdS

Stephen R. Green, Antoine Maillard, Luis Lehner, Steven L. Liebling

摘要:

在广义相对论中研究了实标量场球对称扰动下反德西特时空的稳定性。此外,我们的工作范围内的“两个时间框架”(TTF)近似,它描述了领先的非线性效应的小振幅扰动,因此适合于研究弱湍流不稳定性的AdS-包括崩溃和非崩溃的解决方案。我们以前已经确定了一类拟周期(QP)的TTF方程的解决方案,并在这项工作中,我们分析其稳定性。我们发现,存在几个家庭的QP解决方案是稳定的线性顺序,我们认为,这些解决方案代表岛屿的稳定TTF。我们提取的QP解决方案的小振荡的本征模,我们用它们来预测近似的复发时间为通用的非崩溃的初始数据在完整的(非TTF)系统。或者,当足够的能量被驱动到高频模式时,如远离QP解的初始数据所发生的那样,TTF描述作为对整个系统的近似而分解。根据整个系统的高阶动力学,这通常是即将坍缩成黑洞的信号。

英文摘要:

We study the stability of anti-de Sitter (AdS) spacetime to spherically symmetric perturbations of a real scalar field in general relativity. Further, we work within the context of the "two time framework" (TTF) approximation, which describes the leading nonlinear effects for small amplitude perturbations, and is therefore suitable for studying the weakly turbulent instability of AdS---including both collapsing and non-collapsing solutions. We have previously identified a class of quasi-periodic (QP) solutions to the TTF equations, and in this work we analyze their stability. We show that there exist several families of QP solutions that are stable to linear order, and we argue that these solutions represent islands of stability in TTF. We extract the eigenmodes of small oscillations about QP solutions, and we use them to predict approximate recurrence times for generic non-collapsing initial data in the full (non-TTF) system. Alternatively, when sufficient energy is driven to high-frequency modes, as occurs for initial data far from a QP solution, the TTF description breaks down as an approximation to the full system. Depending on the higher order dynamics of the full system, this often signals an imminent collapse to a black hole.

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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