A5064462313- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Noncommutative and Quantum Gravity Theories
- Pulsars and Gravitational Waves Research
- Galaxies: Formation, Evolution, Phenomena
- Advanced Differential Geometry Research
- Topological Materials and Phenomena
- Quantum Electrodynamics and Casimir Effect
- Astrophysical Phenomena and Observations
- Quantum many-body systems
- Geophysics and Gravity Measurements
- Graphene research and applications
- Advanced Condensed Matter Physics
- Iron-based superconductors research
- Rare-earth and actinide compounds
- Particle physics theoretical and experimental studies
- Physics of Superconductivity and Magnetism
- Spectroscopy and Quantum Chemical Studies
- Fluid Dynamics and Turbulent Flows
- Nonlinear Waves and Solitons
- 2D Materials and Applications
- Quantum chaos and dynamical systems
- Technology and Security Systems
- Adsorption and biosorption for pollutant removal
- Quantum and electron transport phenomena
Southwest University
2017-2024
Lanzhou University
2010-2023
Harbin Engineering University
2023
Guizhou Electric Power Design and Research Institute
2022
Shanghai Institute of Applied Physics
2014-2019
Fujian Normal University
2019
Tan Kah Kee Innovation Laboratory
2019
Institute of Theoretical Physics
2010-2018
Shanghai Synchrotron Radiation Facility
2014
Abstract A novel four-dimensional Einstein-Gauss-Bonnet gravity was formulated by Glavan and Lin (Phys. Rev. Lett. 124:081301, 2020), which is intended to bypass the Lovelock’s theorem yield a non-trivial contribution gravitational dynamics. However, validity consistency of this theory has been called into question recently. We study static spherically symmetric black hole charged Born–Infeld electric field in Einstein–Gauss–Bonnet gravity. It found that solution still suffers singularity...
Abstract We derive the exact solutions for electrically charged black holes both in absence and presence of a cosmological constant gravitational theory with Lorentz violation induced by background Kalb–Ramond (KR) field. The corresponding thermodynamic properties are investigated. It is found that standard first law thermodynamics Smarr formula remain valid KR holes. Nevertheless, Lorentz-violating effect influences their ranges local stability first- second-order phase transition points....
The Lorentz symmetry of gravity is spontaneously broken when the nonminimally coupled Kalb-Ramond field acquires a nonzero vacuum expectation value. In this work, we present exact solutions for static and spherically symmetric black holes in framework Lorentz-violating theory. order to explore physical implications violation, analyze thermodynamic properties obtained evaluate impact violation on some classical gravitational experiments within Solar System. Furthermore, parameter constrained...
This work tries to find out thick brane solutions in braneworld scenarios described by a real scalar field the presence of scalar-kinetic term F(X, ϕ)=Xϕm with single extra dimension, where stands for standard kinetic and m=0, 1, 2... . We mainly consider bent branes, namely de Sitter anti-de four-dimensional slices. The flat are obtained when taking cosmological constant Λ4→0. When parameter these turn those scenario. localization spectrum graviton on branes also analyzed.
Recently, a new spin-$1/2$ fermionic quantum field with mass dimension one in four dimensions--Elko $\ensuremath{\lambda}$ was introduced as candidate of dark matter. In this paper, we investigate the localization 5D Elko spinors on Minkowski branes by presenting equation KK modes. For free massless field, zero mode can be localized Randall-Sundrum thin but cannot majority thick branes. There do not exist bound massive modes all these If term is introduced, there will brane model. And when...
Recently, inspired by Eddington's theory, an alternative gravity called Eddington-inspired Born-Infeld was proposed Ba\~nados and Ferreira. It is equivalent to Einstein's general relativity in vacuum, but deviates from it when matter included. Interestingly, seems that the cosmological singularities are prevented this theory. Based on new we investigate a thick brane model with scalar field presenting five-dimensional background. A domain wall solution obtained, further, find at low energy...
A new theory of gravity called Eddington-inspired Born-Infeld (EiBI) was recently proposed by Ba\~{n}ados and Ferreira. This leads to some exciting features, such as free cosmological singularities. In this paper, we first obtain a charged EiBI black hole solution with nonvanishing constant when the electromagnetic field is included in. Then based on it, study strong gravitational lensing asymptotic flat hole. The deflection limit coefficients observables are shown closely depend additional...
A quantum spin liquid is an exotic state of matter that does not exhibit any classical magnetic ordered ground state. The realization such a in actual materials significant importance as it would provide path to protected states for information applications and also Majorana fermions - both areas vigorous current activity interest condensed physics. However, no solid evidence the existence has been established laboratory, despite decades-long search. Here, authors report pressure-induced...
Primordial black holes (PBHs) could be formed if large perturbations are generated on small scales in inflation. We study a toy inflation model with local minimum. The curvature enhanced when the inflaton passes through minimum, more efficient amplification rate than that of quasi-inflection point inflation, leading to production PBHs scales. comprise total dark matter mass window ${10}^{16}--{10}^{20}\text{ }\text{ }\mathrm{g}$.
With the new physical interpretation of quasinormal modes proposed by Maggiore, quantum area spectra black holes have been investigated recently. Adopting modified Hod's treatment, results show that for are equally spaced and spacings in a unified form, $△A=8\ensuremath{\pi}\ensuremath{\hbar}$, Einstein gravity. On other hand, following Kunstatter's method, studies spectrum nonrotating hole with no charge is equidistant. And rotating (or charged) hole, it also equidistant independent angular...
Recently, a novel idea about our expanding Universe was proposed by T. Padmanabhan [arXiv:1206.4916]. He suggested that the expansion of can be thought as emergence space cosmic time progresses. The is governed basic relation increase rate Hubble volume linearly determined difference between number degrees freedom on horizon surface and one in bulk. In this paper, following idea, we generalize to derive Friedmann equations an $(n+1)$-dimensional Friedmann-Robertson-Walker universe...
We study the full linear perturbations of a homogeneous and isotropic spacetime in Eddington-inspired Born-Infeld gravity. The stabilities are analyzed Eddington regime. find that, for positive $\ensuremath{\kappa}$, scalar modes stable infinite wavelength limit ($k=0$) but unstable $k\ensuremath{\ne}0$. vector tensor mode is regime, independent wave $k$. However, these hence cause instabilities negative $\ensuremath{\kappa}$.
Abstract The archetypical 3D topological insulators Bi 2 Se 3 , Te and Sb commonly exhibit high bulk conductivities, hindering the characterization of surface state charge transport. optimally doped 2− x S, however, allow for such characterizations to be made. Here we report an experimental comparison conductance states in 1.1 0.9 based on temperature-dependent high-pressure measurements. We find that at low temperature remains constant face orders magnitude increase conductance, revealing a...
We consider a braneworld model in the scalar-tensor gravity. In order to solve gauge hierarchy problem this model, our world should be confined on positive tension brane rather than negative one. This is crucial reproduce correct Friedmann-like equation brane. Interestingly, it found that spacing of mass spectrum scenario very tiny, but light gravitons cannot observed individually colliders because their sufficiently weak interaction with matter fields visible
In this paper, we study numerically the quasi-equatorial lensing by stationary, axially-symmetric black hole in Kerr-Taub-NUT spacetime strong field limit. The deflection angle of light ray and other limit coefficients are obtained they found to be closely dependent on NUT charge n spin a. We also compute magnification positions relativistic images. caustics studied results show that these drift away from optical axis, which is quite different Schwarzschild case. Moreover, intersections...
We study the large scale structure formation in Eddington-inspired Born-Infeld (EiBI) gravity. It is found that linear growth of scalar perturbations EiBI gravity deviates from general relativity for modes with wave numbers ($k$), but deviation largely suppressed expansion Universe. investigate integrated Sachs-Wolfe effect gravity, and find its on angular power spectrum anisotropy cosmic microwave background almost same as Lambda--cold dark matter...
We apply the mimetic f(T) theory into thick brane model. take Lagrange multiplier formulation of action and get corresponding field equations motion. find solutions for different kinds f(T). Besides, we investigate stability by considering tensor perturbations vielbein. Localization problem is also studied it shown that four-dimensional gravity can be recovered all solutions. The effects torsion show polynomial form f(T), zero mode has a split compared with f(T)=T, but situations exponential...
The Born-Infeld $f(T)$ theory is reduced from the determinantal gravity in Weitzenb\"ock spacetime. We investigate a braneworld scenario this and obtain an analytic domain wall solution by utilizing first-order formalism. model stable against linear tensor perturbation. It shown that massless graviton localized on brane, but continuous massive gravitons are non-localized will generate tiny correction with behavior of ${1}/{(k r)^{3}}$ to Newtonian potential. four-dimensional teleparallel...
Recently, Pani, Sotiriou, and Vernieri explored a new theory of gravity by adding nondynamical fields, i.e., with auxiliary fields [Phys. Rev. D 88, 121502(R) (2013)]. In this theory, higher-order derivatives matter generically appear in the field equations. paper we extend to any dimensions discuss thick braneworld model five dimensions. Domain wall solutions are obtained numerically. The stability brane system under tensor perturbation is analyzed. We find that stable zero mode localized...
Stability and localization of the gravitational perturbations for a special brane system in Eddington-inspired Born-Infeld (EiBI) gravity were studied [Phys. Rev. D 85, 124053 (2012)]. In this paper, we show that general are stable, four-dimensional graviton (massless KK graviton) can be localized on brane, mass spectrum massive gravitons gapless continuous. Two models constructed as examples. first model, which is generalization (2012)], has no inner structure there resonance...