arXiv:2412.19683gr-qccs.LG2024-12被引 2

用机器学习+循环分析,自动检测引力系统中的共振现象。

Combining Machine Learning with Recurrence Analysis for resonance detection

  • 结合循环分析与LSTM模型识别轨道共振特征。
  • 在标准映射和强引力场中成功检测共振,准确率高。
  • 适合研究黑洞双星动力学的科研人员使用。

在近可积系统中,共振宽度可反映扰动参数如何使系统偏离可积性。尽管本文方法具有通用性,但重点应用于极端质量比旋进(EMRI)系统——即小质量致密天体在超大质量黑洞引力辐射下螺旋入内。在此过程中,小天体会穿越共振区,而这些共振尚未被充分建模。测量共振宽度有助于评估各扰动参数对系统偏离共振的影响,从而决定是否需纳入波形建模。研究首先证明,轨道的循环量化指标能刻画共振行为,且不依赖系统维度。随后采用长短期记忆(LSTM)网络自动化共振检测。分析从简单标准映射逐步扩展至更复杂系统,最终应用于文献中的变形Kerr时空(Johannsen-Psaltis时空)。

原文摘要 · Abstract (English)

The width of a resonance in a nearly integrable system, i.e. in a non-integrable system where chaotic motion is still not prominent, can tell us how a perturbation parameter is driving the system away from integrability. Although the tool that we are presenting here can be used is quite generic and can be used in a variety of systems, our particular interest lies in binary compact object systems known as extreme mass ratio inspirals (EMRIs). In an EMRI a lighter compact object, like a black hole or a neutron star, inspirals into a supermassive black hole due to gravitational radiation reaction. During this inspiral the lighter object crosses resonances, which are still not very well modeled. Measuring the width of resonances in EMRI models allows us to estimate the importance of each perturbation parameter able to drive the system away from resonances and decide whether its impact should be included in EMRI waveform modeling or not. To tackle this issue in our study we show first that recurrence quantifiers of orbits carry imprints of resonant behavior, regardless of the system's dimensionality. As a next step, we apply a long short-term memory machine learning architecture to automate the resonance detection procedure. Our analysis is developed on a simple standard map and gradually we extend it to more complicated systems until finally we employ it in a generic deformed Kerr spacetime known in the literature as the Johannsen-Psaltis spacetime.

引力波机器学习共振检测黑洞动力学

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