10 papers
Scalar absorption beyond geometric optics in Klein-Gordon-separable Johannsen black hole spacetimes
Jining Tang, Yang Huang, Hongsheng Zhang
Johannsen metric is a natural and significant generalization of the Kerr metric, representing the most general stationary, axisymmetric spacetime that preserves the Carter constant…
Time-reversed Shannon entropy as a chaos indicator for non-integrable systems
Wenfu Cao, Siyan Chen, Hongsheng Zhang
We propose a novel chaos indicator -- time-reversed Shannon entropy (TRSE) -- that leverages the interplay between time-reversal symmetry breaking and information entropy in curved…
Absorption and scattering of massless scalar waves by Frolov black holes
Jining Tang, Yang Huang, Hongsheng Zhang
We study the absorption and scattering of massless scalar waves by Frolov black holes, a regular deformation of the Reissner--Nordström geometry. A null-geodesic analysis provides…
Dynamics of photons and shadows for black holes haired with parity-odd fields
Yang Huang, Dao-Jun Liu, Hongsheng Zhang
Strong self-gravitational fields enable the realization of macroscopic odd-parity quantum objects. Using ray-tracing methods, we systematically analyze the dynamics of photons and…
Spontaneous genesis of naked singularities through quantum-gravitational processes: conclusive evidence for violation of cosmic censorship
Yang Huang, Hongsheng Zhang
Cosmic censorship conjecture takes a pivotal status in general relativity. We demonstrate that quantum effects, Hawking effect together with Shwinger effect inevitably lead to viol…
Screen chaotic motion by Shannon entropy in curved spacetimes
Wenfu Cao, Yang Huang, Hongsheng Zhang
We find a novel characteristic for chaotic motion by introducing Shannon entropy for periodic orbits, quasiperiodic orbits, and chaotic orbits.We compare our approach with the prev…