6 papers
Prospect on constraining environment-dependent dilaton model from gravitational redshift measurements
Li Hu, Rong-Gen Cai, Song He +4
Scalar-tensor gravity represents a natural extension of general relativity. This paper investigates a conformal scalar-tensor gravity, the environmentally dependent dilaton model,…
Thermodynamics of Kerr-Bertotti-Robinson black hole
Li Hu, Rong-Gen Cai, Shao-Jiang Wang
We investigate the thermodynamic properties of the Kerr-Bertotti-Robinson black hole, an exact Petrov type-D solution of Einstein-Maxwell theory describing a rotating black hole im…
Black hole-de Sitter space as the fastest transmitter and receiver
Rong-Gen Cai, Li Hu, Shao-Jiang Wang
It is well-known that the unitary nature of black hole evaporation enforces its entropy evolution to follow the Page curve. In this Letter, we find that the quantum speed limit on…
Third law of repetitive electric Penrose processes
Li Hu, Rong-Gen Cai, Shao-Jiang Wang
Recently, Ruffini et al. [Phys. Rev. Lett. 134 (2025) 8, 081403] pointed out that the repetitive Penrose process cannot drain the entire extractable energy of a Kerr black hole. In…
Dynamical friction can flip the hierarchical three-body system
Li Hu, Rong-Gen Cai, Shao-Jiang Wang
In recent years, the long-term effects of non-linear perturbations were found to be important for the evolution of the hierarchical triple system, which, for the central third body…
Distinctive GWBs from eccentric inspiraling SMBH binaries with a DM spike
Li Hu, Rong-Gen Cai, Shao-Jiang Wang
Recent detections of a low-frequency gravitational wave background (GWB) from various pulsar-timing-array (PTA) observations have renewed the interest in the inspiraling supermassi…