Probing loop quantum effects through solar system experiments: observational signatures and parameter constraints
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866916862065901568 |
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| author | Ai, Wen-Juan Chen, Ruo-Ting Zhu, Li-Gang Wu, Jian-Pin |
| author_facet | Ai, Wen-Juan Chen, Ruo-Ting Zhu, Li-Gang Wu, Jian-Pin |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_03218 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing loop quantum effects through solar system experiments: observational signatures and parameter constraints Ai, Wen-Juan Chen, Ruo-Ting Zhu, Li-Gang Wu, Jian-Pin General Relativity and Quantum Cosmology High Energy Physics - Theory 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. |
| title | Probing loop quantum effects through solar system experiments: observational signatures and parameter constraints |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2504.03218 |