489 citations · 925 across the 26 of their papers we have counts for
20 papers · 1 filter
Black hole and cosmos with multiple horizons and multiple singularities in vector-tensor theories
Changjun Gao, Youjun Lu, Shuang Yu +1
A stationary and spherically symmetric black hole (For example, Reissner-Nordstrom black hole or Kerr-Newman black hole) has at most one singularity and two horizons. One horizon i…
Pulsation of black holes
Changjun Gao, Youjun Lu, You-Gen Shen +1
The Hawking-Penrose singularity theorem states that a singularity forms inside a black hole in general relativity. To remove this singularity one must resort to a more fundamental…
Generalized uncertainty principles, effective Newton constant and regular black holes
Xiang Li, Yi Ling, You-Gen Shen +3
In this paper, we explore the quantum spacetimes that are potentially connected with the generalized uncertainty principles. By analyzing the gravity-induced quantum interference p…
Exact solutions in f(R) theory of gravity
Changjun Gao, You-Gen Shen
We find a new method for looking for the static and spherically symmetric solutions in theory of gravity. With this method, a number of new solutions in terms of the analyti…
Cosmic evolution of scalar fields with multiple vacua: generalized DBI and quintessence
Changjun Gao, You-Gen Shen
We find a method to rewrite the equations of motion of scalar fields, generalized DBI field and quintessence, in the autonomous form for\emph{arbitrary} scalar potentials. With the…
Quintessence and phantom emerging from the split-complex field and the split-quaternion field
Changjun Gao, Xuelei Chen, You-Gen Shen
Motivated by the mathematic theory of split-complex numbers (or hyperbolic numbers, also perplex numbers) and the split-quaternion numbers (or coquaternion numbers), we define the…
A Static Spherically Symmetric Solution of the Einstein-aether Theory
Changjun Gao, You-Gen Shen
By using of the Euler-Lagrange equations, we find a static spherically symmetric solution in the Einstein-aether theory with the coupling constants restricted. The solution is simi…
Black Holes in the Universe: Generalized Lemaitre-Tolman-Bondi Solutions
Changjun Gao, Xuelei Chen, You-Gen Shen +1
We present new exact solutions {which presumably describe} black holes in the background of a spatially flat, pressureless dark matter (DM)-, or dark matter plus dark energy (DM+DE…
Acoustic black holes from supercurrent tunneling
Xian-Hui Ge, Shao-Feng Wu, Yunping Wang +2
We present a version of acoustic black holes by using the principle of the Josephson effect. We find that in the case two superconductors and are separated by an insulating…
Dynamics of phantom model with O(N) symmetry in loop quantum cosmology
Zu-Yao Sun, Chun-Xiao Yue, You-Gen Shen +1
Many astrophysical data show that the expansion of our universe is accelerating. In this paper, we study the model of phantom with O(N) symmetry in background of loop quantum cosmo…
Does the mass of a black hole decrease due to the accretion of phantom energy
Changjun Gao, Xuelei Chen, Valerio Faraoni +1
According to Babichev et al., the accretion of a phantom test fluid onto a Schwarzschild black hole will induce the mass of the black hole to decrease, however the backreaction was…
Geometric Flows and Black Holes
Fu-Wen Shu, You-Gen Shen
Motivated by the newest progress in geometric flows both in mathematics and physics, we apply the geometric evolution equation to study some black-hole problems. Our results show t…
Quasinormal modes of Rarita-Schwinger field in Reissner-Nordström black hole spacetimes
Fu-Wen Shu, You-Gen Shen
The Newman-Penrose formalism is used to deal with the quasinormal modes(QNM's) of Rarita-Schwinger perturbations outside a Reissner-Nordström black hole. We obtain four kinds of po…
Neutrino Quasinormal Modes of a Kerr-Newman-de Sitter Black Hole
Jia-Feng Chang, You-Gen Shen
Using the Pöshl-Teller approximation, we evaluate the neutrino quasinormal modes (QNMs) of a Kerr-Newman-de Sitter black hole. The result shows that for a Kerr-Newman-de Sitter bla…
Relating Quantum Information to Charged Black Holes
Xian-Hui Ge, You-Gen Shen
Quantum non-cloning theorem and a thought experiment are discussed for charged black holes whose global structure exhibits an event and a Cauchy horizon. We take Reissner-Norström…
Quasinormal modes in Schwarschild black holes due to arbitrary spin fields
Fu-Wen Shu, You-Gen Shen
The Newman-Penrose formalism is used to deal with the massless scalar, neutrino, electromagnetic, gravitino and gravitational quasinormal modes (QNMs) in Schwarzschild black holes…
Quasinormal modes of charged black holes in string theory
Fu-Wen Shu, You-Gen Shen
Both scalar and Dirac quasinormal modes in Garfinkle-Horowitz-Strominger black hole spacetime are studied by using the WKB approximation and the Pöschl-Teller approximation. For sc…
Phantom Cosmology with Non-minimally Coupled Real Scalar Field
Zu-Yao Sun, You-Gen Shen
We find that the expansion of the universe is accelerating by analyzing the recent observation data of type $\textsc{I}a$ supernova(SN-Ia) .It indicates that the equation of state…
Entropy in the NUT-Kerr-Newman Black Holes Due to an Arbitrary Spin Field
Xian-Hui Ge, You-Gen Shen
Membrane method is used to compute the entropy of the NUT-Kerr-Newman black holes. It is found that even though the Euler characteristic is greater than two, the Bekenstein-Hawking…
Scalar Gravity and Higgs Mechanism
Chi-Yi Chen, Kang Li, You-Gen Shen
The role that the auxiliary scalar field played in Brans-Dicke cosmology is discussed. If a constant vacuum energy is assumed to be the origin of dark energy, then the correspo…