arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2602.15523gr-qchep-th
收藏

正则黑洞时空中的位移记忆

Displacement memory in regular black hole spacetimes

Indian Institute of Technology, Kharagpur(印度理工学院卡拉格普尔分校)

Ritwik Acharyya, Sayan Kar

AI总结:

研究正则黑洞中波脉冲引起的位移记忆效应,通过数值方法分析测地线分离和偏差,发现位移记忆依赖于正则化参数和脉冲高度。

摘要:

在正则黑洞时空中的位移记忆,通过测地线(时状)分离和测地线偏差进行研究。在这样的黑洞中,波脉冲的存在通过出现在限制版本的通用Bondi-Sachs型线元中的函数H(u)来建模。选择sech平方型的H(u)函数,我们首先在平坦背景中进行数值研究测地线分离和测地线偏差。此后,在黑洞附近远处的区域进行类似的调查。我们的结果表明存在一种明显的位移记忆效应,其依赖于正则化参数g的值以及脉冲高度。在不同类型的正则黑洞之间,人们注意到净位移记忆在参数依赖下发生变化。此外,正则和奇异黑洞在大u值下的位移记忆幅度也存在明显差异。

英文摘要:

Displacement memory, induced by a wave pulse in a regular black hole spacetime, is studied using geodesic (timelike) separation and geodesic deviation. The presence of the wave pulse in such a black hole is modeled via a function $H(u)$ appearing in a restricted version of a generic Bondi-Sachs type line element. Choosing a sech-squared profile for $H(u)$, we first study (numerically) geodesic separation and geodesic deviation in a flat background. Thereafter, similar investigations are carried out in the presence of the black hole, but in regions far away from the vicinity of the horizon. Our results suggest the presence of a distinct displacement memory effect, which depends on the value of the regularisation parameter $g$ as well as the pulse height. Between different types of regular black holes, one notices parameter-dependent changes in the net displacement memory. Further, a clear difference in the magnitude of displacement memory (at large $u$) in regular and singular black holes is also visible in our numerical results.

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。

↑