Journal
PHYSICAL REVIEW D
Volume 102, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.102.124042
Keywords
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Funding
- National Natural Science Foundation of China [11675145, 11975203]
- Zhejiang Provincial Natural Science Foundation of China [LR21A050001, LY20A050002]
- Fundamental Research Funds for the Provincial Universities of Zhejiang in China [RFA2019015]
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The self-dual spacetime was derived from the mini-superspace approach, based on the polymerization quantization procedure in loop quantum gravity (LQG). Its deviation from the Schwarzschild spacetime is characterized by the polymeric function P, purely due to the geometric quantum effects from LQG. In this paper, we consider the observational constraints imposed on P by using the Solar System experiments and observations. For this purpose, we calculate in detail the effects of P on astronomical observations conducted in the Solar System, including the deflection angle of light by the Sun, gravitational time delay, perihelion advance, and geodetic procession. The observational constraints are derived by confronting the theoretical predictions with the most recent observations. Among these constraints, we find that the tightest one comes from the measurement of the gravitational time delay by the Cassini mission, which yields 0 < P < 5.5 x 10(-6). In addition, we also discuss the potential constraint that can be obtained in the near future by the joint European-Japanese BepiColombo project, and show that it could significantly improve the current constraints.
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