Jian-Ming Yan

Sep 13, 2024 | link.aps.org | Tao Zhu |Wen Zhao |Jian-Ming Yan |Yuan-Zhu Wang

Gravitational wave (GW) observations provide sensitive tests of parity and Lorentz symmetries of gravity. Any violation of these fundamental symmetries induces possible deviations in the GW propagations.

Apr 26, 2023 | link.aps.org | Cheng Liu |Tao Zhu |Qiang Wu |Jian-Ming Yan

Abstract In this paper, we use the publicly available observational data of 17 stellar stars orbiting Sgr A* to test the quantum extension of Schwarzschild spacetime in loop quantum gravity (LQG). For our purpose, we transform the geodesical evolution of a massive particle in the quantum-extended Schwarzschild black hole to the perturbed Kepler problem and calculate the effects of LQG on the pericenter advance of the stellar stars.