4 papers
Constraints on parity and Lorentz violations in gravity from GWTC-3 through a parametrization of modified gravitational wave propagations
Tao Zhu, Wen Zhao, Jian-Ming Yan +3
Gravitational wave (GW) observations provide sensitive tests of parity and Lorentz symmetries of gravity. Any violation of these fundamental symmetries induces possible deviations…
Nonexistence of quantum black and white hole horizons in an improved dynamic approach
Wen-Cong Gan, Xiao-Mei Kuang, Zhen-Hao Yang +3
In this paper, we study the quantum geometric effects near the locations where classical black hole horizons used to appear in Einstein's classical theory, within the framework of…
Kerr-Newman-modified-gravity black hole's impact on the magnetic reconnection
Sanjar Shaymatov, Mirzabek Alloqulov, Bobomurat Ahmedov +1
In this paper, we study the magnetic reconnection process of energy extraction from a rapidly rotating Kerr-Newman-modified-gravity (MOG) black hole by investigating the combined e…
The de Sitter group and its representations: a window on the notion of de Sitterian elementary systems
Mohammad Enayati, Jean-Pierre Gazeau, Hamed Pejhan +1
We review the construction of ("free") elementary systems in de Sitter (dS) spacetime, in the Wigner sense, as associated with unitary irreducible representations (UIR's) of the dS…