Publications (51)
Topological Properties of Phase Singularities in Wave Fields
Yi-Shi Duan, Ji-Rong Ren, Tao Zhu
Phase singularities as topological objects of wave fields appear in a variety of physical, chemical, and biological scenarios. In this paper, by making use of the -mapping topo…
Dirac-boson stars
Chen Liang, Ji-Rong Ren, Shi-Xian Sun +1
In this paper, we construct \textit{Dirac-boson stars} (DBSs) model composed of a scalar field and two Dirac fields. The scalar field and both Dirac fields are in the ground state.…
Acceleration of particles in Einstein-Maxwell-dilaton black holes
Pu-Jian Mao, Ran Li, Lin-Yu Jia +1
It has recently been pointed out that, under certain conditions, the energy of particles accelerated by black holes in the center-of-mass frame can become arbitrarily high. In this…
Evolution of the Spiral Waves in Excitable System
Ji-Rong Ren, Tao Zhu, Shu-Fan Mo
Spiral wave, whose rotation center can be regarded as a point defect, widely exists in various two dimensional excitable systems. In this paper, by making use of \emph{Duan's topol…
Ghost field realizations of the spinor strings based on the linear W(1,2,s) algebras
Yu-Xiao Liu, Li-Jie Zhang, Ji-Rong Ren
It has been shown that certain W algebras can be linearized by the inclusion of a spin-1 current. This Provides a way of obtaining new realizations of the W algebras. In this paper…
Influence of Generalized and Extended Uncertainty Principle on Thermodynamics of FRW universe
Tao Zhu, Ji-Rong Ren, Ming-Fan Li
The influence of the generalized uncertainty principle (GUP) and extended uncertainty principle (EUP) on the thermodynamics of the Friedmann-Robertson-Walker (FRW) universe has bee…
The branch processes of vortex filaments and Hopf Invariant Constraint on Scroll Wave
Tao Zhu, Ji-Rong Ren, Shu-Fan Mo
In this paper, by making use of Duan's topological current theory, the evolution of the vortex filaments in excitable media is discussed in detail. The vortex filaments are found g…
Anomaly analysis of Hawking radiation from 2+1 dimensional spinning black hole
Shao-Wen Wei, Ran Li, Yu-Xiao Liu +1
Considering gravitational and gauge anomalies at the horizon, a new successful method that to derive Hawking radiations from black holes has been developed recently by Wilczek et a…
Topological Aspect of Knotted Vortex Filaments in Excitable Media
Ji-Rong Ren, Tao Zhu, Yi-Shi Duan
Scroll waves exist ubiquitously in three-dimensional excitable media. It's rotation center can be regarded as a topological object called vortex filament. In three-dimensional spac…
The Bifurcation Theory of Magnetic Monopoles in a Charged Two-Condensate Bose-Einstein System
Shu-Fan Mo, Ji-Rong Ren, Tao Zhu
Magnetic monopoles, that are particle-like field configurations with which one can associate a topological charge, widely exist in various three dimensional condensate systems. In…
Fermions tunnelling with quantum gravity correction
Zhen-Yu liu, Ji-Rong Ren
Quantum gravity correction is truly important to study tunnelling process of black hole. Base on the generalized uncertainty principle, we investigate the influence of quantum grav…
Magnetic Skyrmions are Quasi-Magnetic Monopoles in Two-Dimensional Magnetic Materials
Ji-Rong Ren, Zhi Wang, Fei Qu +1
Using Cartan subalgebra local bases parametrization of density operator , we prove that the Wu-Yang potentials of a general -level quantum system are completely expr…
Causal diffusions, causal Zeno effect and collision number
Ji-Rong Ren, Ming-fan Li, Tao Zhu
We consider diffusion processes with the help of Markov random walk models. Especially the process of diffusion of a relativistic particle in a relativistic equilibrium system is c…
Insights and possible resolution to the information loss paradox via the tunneling picture
Douglas Singleton, Elias C. Vagenas, Tao Zhu +1
This paper investigates the information loss paradox in the WKB/tunneling picture of Hawking radiation. In the tunneling picture one can obtain the tunneling amplitude to all order…
Thermodynamics of Friedmann Equation and Masslike Function in General Braneworld
Tao Zhu, Ji-Rong Ren, Shu-Fan Mo
Using the generalized procedure proposed by \emph{Wu et al}\cite{wu} recently, we construct the first law of thermodynamics on apparent horizon in a general braneworld model with c…
Topological Properties of Spatial Coherence Function
Ji-Rong Ren, Tao Zhu, Yi-Shi Duan
Topology of the spatial coherence function is considered in details. The phase singularity (coherence vortices) structures of coherence function are classified by Hopf index and Br…
Dirac-Proca stars
Tian-Xiang Ma, Chen Liang, Ji-Rong Ren +1
We consider a model consists of the Einstein gravity in four-dimensional spacetime, a Proca field and two Dirac fields through minimum coupling. By numerically solving this model,…
Physical States and BRST Operators for Higher-spin Strings
Yu-Xiao Liu, Shao-Wen Wei, Li-Jie Zhang +1
In this paper, we mainly investigate the system, in which the matter and the Liouville subsystems generate and algebras r…
Series expansion in fractional calculus and fractional differential equations
Ming-Fan Li, Ji-Rong Ren, Tao Zhu
Fractional calculus is the calculus of differentiation and integration of non-integer orders. In a recently paper (Annals of Physics 323 (2008) 2756-2778), the Fundamental Theorem…
Cosmic Strings and Quintessence
Yi-Shi Duan, Ji-Rong Ren, Jie Yang
We present a new Lorentz gauge invariant U(1) topological field theory in Riemann-Cartan spacetime manifold . By virtue of the decomposition theory of U(1) gauge potential a…
Hawking-like radiation as tunneling from the apparent horizon in a FRW Universe
Tao Zhu, Ji-Rong Ren, Douglas Singleton
We study Hawking-like radiation in a Friedmann-Robertson-Walker (FRW) universe using the quasi-classical WKB/tunneling method which pictures this process as a "tunneling" of partic…
Fractional Vector Calculus and Fractional Special Function
Ming-Fan Li, Ji-Rong Ren, Tao Zhu
Fractional vector calculus is discussed in the spherical coordinate framework. A variation of the Legendre equation and fractional Bessel equation are solved by series expansion an…
Quantization of Black Hole Entropy from Quasinormal Modes
Shao-Wen Wei, Ran Li, Yu-Xiao Liu +1
In Phys. Rev. D 78 (2008) 104018 [arXiv:0807.1481], the conclusion that "entropy eigenvalues of GB black hole are discrete and equally spaced, but the area spacing is not equidista…
Multi-state Dirac stars
Chen Liang, Shi-Xian Sun, Ji-Rong Ren +1
In this paper, we construct the multi-state Dirac stars (MSDSs) consisting of two pairs of Dirac fields. The two pairs of Dirac fields are in the ground state and the first excited…
Fermion Resonances on Multi-field Thick Branes
Yu-Xiao Liu, Hai-Tao Li, Zhen-Hua Zhao +2
Motivated by the recent work on the fermion resonances on scalar-constructed thick branes (arXiv:0901.3543 and arXiv:0904.1785), we extend the idea to multi-scalar generated thick…
Weak cosmic censorship conjecture is not violated for a rotating linear dilaton black hole
Fei Qu, Si-Jiang Yang, Zhi Wang +1
In this paper, we investigate the validity of the weak cosmic censorship conjecture(WCCC) for a rotating linear dilaton black hole from two different methods. By using the classsic…
Topological aspects in a two component Bose condensed system in neutron star
Heng Guo, Ji-Rong Ren
By making use of Duan-Ge's decomposition theory of gauge potential and the Duan's topological current theory proposed by Prof. Duan Yi-Shi, we study a two component superfluid Bose…
Explicit field realizations of W algebras
Shao-Wen Wei, Yu-Xiao Liu, Li-Jie Zhang +1
The fact that certain non-linear algebras can be linearized by the inclusion of a spin-1 current can provide a simple way to realize algebras from linear $W_{1,…
Inner topological structure of Hopf invariant
Ji-Rong Ren, Ran Li, Yi-Shi Duan
In light of -mapping topological current theory, the inner topological structure of Hopf invariant is investigated. It is revealed that Hopf invariant is just the winding numbe…
Corrections to Hawking-like Radiation for a Friedmann-Robertson-Walker Universe
Tao Zhu, Ji-Rong Ren
Recently, a Hamilton-Jacobi method beyond semiclassical approximation in black hole physics was developed by \emph{Banerjee} and \emph{Majhi}\cite{beyond0}. In this paper, we gener…
Hawking Temperature of Dilaton Black Holes from Tunneling
Ji-Rong Ren, Ran Li, Fei-Hu Liu
Recently, it has been suggested that Hawking radiation can be derived from quantum tunnelling methods. In this letter, we calculated Hawking temperature of dilatonic black holes fr…
Hawking radiation of Dirac particles via tunneling from Kerr black hole
Ran Li, Ji-Rong Ren, Shao-Wen Wei
We investigated Dirac Particles' Hawking radiation from event horizon of Kerr black hole in terms of the tunneling formalism. Applying WKB approximation to the general covariant Di…
New Spinor Field Realizations of the Non-Critical String
Li-Jie Zhang, Yu-Xiao Liu, Ji-Rong Ren
We investigate the new spinor field realizations of the algebra, making use of the fact that the algebra can be linearized by the addition of a spin-1 current. We t…
Holographic Dual of Linear Dilaton Black Hole in Einstein-Maxwell-Dilaton-Axion Gravity
Ran li, Ji-Rong Ren
Motivated by the recently proposed Kerr/CFT correspondence, we investigate the holographic dual of the extremal and non-extremal rotating linear dilaton black hole in Einstein-Maxw…
Quasinormal Modes of Self-Dual Warped AdS Black Hole in Topological Massive Gravity
Ran Li, Ji-Rong Ren
We consider the various perturbations of self-dual warped AdS black hole and obtain the exact expressions of quasinormal modes by imposing the vanishing Dirichlet boundary cond…
Topological aspect of disclinations in two-dimensional melting
Wei-Kai Qi, Tao Zhu, Yong Chen +1
By using topological current theory, we study the inner topological structure of disclinations during the melting of two-dimensional systems. From two-dimensional elasticity theory…
Localization of Matters on Anti-de Sitter Thick Branes
Yu-Xiao Liu, Heng Guo, Chun-E Fu +1
By presenting the mass-independent potentials of the Kaluza-Klein (KK) modes in the corresponding Schrödinger equations, we investigate the localization and mass spectra of variou…
Corrected entropy of high dimensional black holes
Tao Zhu, Ji-Rong Ren, Ming-Fan Li
Using the corrected expression of Hawking temperature derived from the tunneling formalism beyond semiclassical approximation developed by \emph{Banerjee} and \emph{Majhi}\cite{bey…
Topology of Knotted Optical Vortices
Ji-Rong Ren, Tao Zhu, Yi-Shi Duan
Optical vortices as topological objects exist ubiquitously in nature. In this paper, by making use of the -mapping topological current theory, we investigate the topology in th…
Hawking Radiation of Fermionic Field and Anomaly in 2+1 Dimensional Black Holes
Ran Li, Shi Li, Ji-Rong Ren
The method of anomaly cancellation to derive Hawking radiation initiated by Robinson and Wilczek is applied to 2+1 dimensional stationary black holes. Using the dimensional reducti…
Entropy of Kaluza-Klein Black Hole from Kerr/CFT Correspondence
Ran Li, Ming-Fan Li, Ji-Rong Ren
We extend the recently proposed Kerr/CFT correspondence to examine the dual conformal field theory of Kaluza-Klein black hole. For the extremal Kaluza-Klein black hole, the central…
Hidden Conformal Symmetry of Self-Dual Warped AdS_3 Black Holes in Topological Massive Gravity
Ran Li, Ming-Fan Li, Ji-Rong Ren
We extend the recently proposal of hidden conformal symmetry to the self-dual warped AdS black holes in topological massive gravity. It is shown that the wave equation of massi…
Anomaly analysis of Hawking radiation from Kaluza-Klein black hole with squashed horizon
Shao-Wen Wei, Ran Li, Yu-Xiao Liu +1
Considering gravitational and gauge anomalies at the horizon, a new method that to derive Hawking radiations from black holes has been developed by Wilczek et al. In this paper, we…
Corrected Entropy of Friedmann-Robertson-Walker Universe in Tunneling Method
Tao Zhu, Ji-Rong Ren, Ming-Fan Li
In this paper, we study the thermodynamic quantities of Friedmann-Robertson-Walker (FRW) universe by using the tunneling formalism beyond semiclassical approximation developed by \…
Dirac particles tunneling from BTZ black hole
Ran Li, Ji-Rong Ren
We calculated the Dirac Particles' Hawking radiation from the outer horizon of BTZ black hole via tunneling formalism. Applying WKB approximation to the Dirac equation in (2+1) dim…
Fermions Tunneling from Apparent Horizon of FRW Universe
Ran Li, Ji-Rong Ren, Dun-Fu Shi
In the paper [arXiv:0809.1554], the scalar particles' Hawking radiation from the apparent horizon of Friedmann-Robertson-Walker(FRW) universe was investigated by using the tunnelin…
Building a black hole-wormhole-black hole combination
Xin Su, Chen-Hao Hao, Ji-Rong Ren +1
In this paper, we present the spherically symmetric Proca star in the presence of a phantom field and obtain a traversable wormhole solution for non-trivial topological spacetime.…
Unified First Law and Thermodynamics of Dynamical Black Hole in n-dimensional Vaidya Spacetime
Ji-Rong Ren, Ran Li
As a simple but important example of dynamical black hole, we analysis the dynamical black hole in -dimensional Vaidya spacetime in detail. We investigated the thermodynamics of…
Spinor Field Realizations of the half-integer Strings
Shao-Wen Wei, Yu-Xiao Liu, Li-Jie Zhang +1
The grading Becchi-Rouet-Stora-Tyutin (BRST) method gives a way to construct the integer strings, where the BRST charge is written as . Using this method, we…
Vector and Spinor Decomposition of SU(2) Gauge Potential, their quivalence and Knot Structure in SU(2) Chern-Simons Theory
Yi-Shi Duan, Ji-Rong Ren, Ran Li
In this paper, spinor and vector decomposition of SU(2) gauge potential are presented and their equivalence is constructed using a simply proposal. We also obtain the action of Fad…
Knotted Topological Phase Singularities of Electromagnetic Field
Ji-Rong Ren, Tao Zhu, Shu-Fan Mo
In this paper, knotted objects (RS vortices) in the theory of topological phase singularity in electromagnetic field have been investigated in details. By using the -mapping to…