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arXiv 2606.03751gr-qc
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渐近反德西特时空中自相互作用标量场的临界坍缩

Critical collapse of a self-interacting scalar field in asymptotically anti-de Sitter spacetime

School of Physics and Optoelectronics, South China University of Technology(华南理工大学物理与光电工程学院)

Li-Jie Xin, Xiangdong Zhang

AI总结:

研究渐近反德西特时空中球对称无质量标量场的临界引力坍缩,发现势能形式不改变临界行为,回波周期和临界指数与Choptuik经典结果一致。

摘要:

我们研究了渐近反德西特(AdS)时空中球对称无质量标量场的临界引力坍缩。这里采用的标量场势能与AdS曲率半径$\ell$的平方成反比,该系统存在一个众所周知的精确静态解。在极坐标下工作,我们首先确认当$\ell=8$时,对于一系列不同的初始构型,II型临界坍缩发生,测得的回波周期和临界指数与Choptuik的经典结果非常吻合。然后,我们针对一系列AdS半径$\ell$微调标量场的初始振幅,在极坐标和双零坐标下进行计算以交叉验证结果。我们发现,势能的形式不会以任何有意义的方式改变引力坍缩的临界行为:特别是,回波周期($\Delta \approx 3.4$)和临界指数($\gamma \approx 0.37$)在所有测试的$\ell$值下基本保持不变。

英文摘要:

We study the critical gravitational collapse of a spherically symmetric massless scalar field in asymptotically anti-de Sitter (AdS) spacetime. The scalar field potential adopted here is inversely proportional to the square of the AdS curvature radius $\ell$, and the system admits a well-known exact static solution. Working in polar coordinates, we first confirm that type II critical collapse occurs for a range of distinct initial configurations when $\ell=8$, where the measured echoing period and critical exponent are in excellent agreement with Choptuik's classic results. We then fine-tune the initial amplitude of the scalar field for a series of AdS radii $\ell$, performing calculations in both polar coordinates and double null coordinates to cross-validate our results. We find that the form of the potential does not alter the critical behavior of gravitational collapse in any meaningful way: in particular, both the echoing period ($Δ\approx 3.4$) and critical exponent ($γ\approx 0.37$) remain essentially unchanged across all tested values of $\ell$.

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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