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arXiv 2504.03218gr-qchep-th
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通过太阳系实验探测圈量子效应:观测特征与参数约束

Probing loop quantum effects through solar system experiments: observational signatures and parameter constraints

Wen-Juan Ai, Ruo-Ting Chen, Li-Gang Zhu, Jian-Pin Wu

AI总结:

本文利用光线偏折、Shapiro延迟、水星进动、LAGEOS及S2轨道等多类观测约束有效LQG黑洞参数,发现水星近日点进动给出ζ≲10^-2的最强上限。

摘要:

本研究在由 ζ 参数化的有效圈量子引力(LQG)黑洞模型框架内研究量子引力效应,利用太阳系实验和天体物理观测的精密测量结果。我们分析了广义相对论(GR)的三项经典检验:(1)由类星体射电信号的甚长基线干涉测量(VLBI)观测约束的光线偏折;(2)来自 Cassini 任务的 Shapiro 时间延迟测量;(3)由 MESSENGER 任务数据确定的水星近日点进动。此外,我们将分析扩展到绕地球运行的 LAGEOS 卫星,以及绕银心超大质量黑洞 Sagittarius A*(Sgr A*)运行的 S2 恒星的相对论轨迹。我们的多探针方法表明,对 LQG 参数最严格的约束来自水星近日点进动,给出上界 ζ ≲ 10^-2。这些结果为探测量子引力效应建立了新的观测基准。

英文摘要:

This study investigates quantum gravity effects within the framework of an effective loop quantum gravity (LQG) black hole model parameterized by $ζ$, utilizing precision measurements from solar system experiments and astrophysical observations. We analyze three classical tests of general relativity (GR): (1) Light deflection constrained by very long baseline interferometry (VLBI) observations of quasar radio signals, (2) Shapiro time delay measurements from the Cassini mission, and (3) Mercury's perihelion precession determined by MESSENGER mission data. Additionally, we extend our analysis to Earth-orbiting LAGEOS satellites and the relativistic trajectory of the S2 star orbiting the Galactic Center supermassive black hole Sagittarius $\rm{A}^*$ (Sgr $\rm{A}^{*}$). Our multi-probe approach reveals that the tightest constraint on the LQG parameter comes from Mercury's perihelion precession, yielding an upper bound $ζ\lesssim 10^{-2}$. These results establish new observational benchmarks for probing quantum gravity effects.

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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