18 citations · 48 across the 15 of their papers we have counts for
15 papers
Completing the Penrose Process without a Horizon
Yang Huang, Shiyang Hu, Bin Chen +1
In its standard black-hole realization, the Penrose process uses an event horizon to remove a negative-energy fragment. We show that, at the kinematic level, horizon absorption can…
Distorting Kerr Images with Parity-Odd Scalar Hair
Qian Wan, Yehui Hou, Yang Huang +3
We investigate thin-disk imaging of Kerr black holes with synchronized scalar hair, focusing on backreacted parity-odd excited states of a complex scalar field minimally coupled to…
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…
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…
Matching McVittie spacetimes
Jining Tang, Yang Huang, Hongsheng Zhang
Gravitational collapse and bubble evolution in the asymptotical Friedmann-Lemaitre-Robertson-Walker (FLRW) Universe is an intriguing and intricate problem. We systematically analyz…
Mutual Information for particle pair and its application to diagnose Chaos in Curved Spacetime
Wenfu Cao, Yang Huang, Hongsheng Zhang
We propose the concept of mutual information for particle pair (MIPP) in curved spacetime, and show that MIPP has potential to be a proper chaos indicator. We tested this method in…
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…
Lensing and light rings of parity-odd rotating boson stars
Yang Huang, Dao-Jun Liu, Hongsheng Zhang
We obtain the first image of a parity-odd celestial body. Recently, an intriguing parity-odd rotating boson star was proposed. We investigate the lensing effects of these stars in…
Novel black holes in higher derivative gravity
Yang Huang, Dao-Jun Liu, Hongsheng Zhang
We find a class of novel black holes in higher derivative theory. The novel black holes follow behavior of~\sch\ ones at large mass limit, while dramatically differentiate from ~\s…
True gravitational atom: Spherical cloud of dilatonic black holes
Yang Huang, Hongsheng Zhang
Black hole as elementary particle is a fairly glamorous idea. For ordinary black holes, a surrounding particle inevitably penetrates into the interior of the hole since the center…
Vibrational entropy of crystalline solids from covariance of atomic displacements
Yang Huang, Michael Widom
The vibrational entropy of a solid at finite temperature is investigated from the perspective of information theory. Ab initio molecular dynamics (AIMD) simulations generate ensemb…
Dirac clouds around dilatonic black holes
Yang Huang, Hongsheng Zhang
Dirac cloud is in absence in general relativity since the superradiance mechanism fails to work for Dirac fields. For the first time we find a novel mechanism to support Dirac clou…
Spherical gravitational waves and quasi-spherical waves scattered from black string in massive gravity
Hongsheng Zhang, Yang Huang
Spherical gravitational wave is strictly forbidden in vacuum space in frame of general relativity by the Birkhoff theorem. We prove that spherical gravitational waves do exist in n…