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Gravitational Deflection of Light in Rindler-Type Potential as a Possible Resolution to the Observations of Bullet Cluster 1E0657-558

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Communications in Theoretical Physics 2012年第4期57卷 611-618页

作者：李昕常哲 Institute of High Energy Physics Theoretical Physics Center for Science FacilitiesChinese Academy of Sciences

The surface density Σ-map and the convergence κ-map of Bullet Cluster 1E0657-558 show that the center of baryonic matters separates from the center of gravitational force,and the distribution of gravitational force do not possess spherical *** hints that a modified gravity with difference to Newtonian inverse-square law at large scale,and less symmetry is worth *** this paper,we study the dynamics in Randers-finsler *** Newtonian limit and gravitational deflection of light in a Rindler-type potential is focused in *** is shown that the convergence in finsler spacetime could account for the observations of Bullet Cluster.

关键词： modified gravity finsler spacetime Bullet Cluster

Gravitational Wave in Lorentz Violating Gravity

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Communications in Theoretical Physics 2013年第11期60卷 535-540页

作者：李昕常哲 Institute of High Energy Physics and Theoretical Physics Center for Science Facilities Chinese Academy of Sciences

By making use of the weak gravitational field approximation, we obtain a linearized solution of the gravitational vacuum field equation in an anisotropic spacetime. The plane-wave solution and dispersion relation of gravitationaJ wave is presented explicitly. There is possibility that the speed of gravitational wave is larger than the speed of light and the easuality still holds. We show that the energy-momentum of gravitational wave in the ansiotropic spacetime is still well defined and conserved.

关键词： special relativity finsler spacetime projectively flat

Spatial and temporal variations of the fine-structure constant in the finslerian universe

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Chinese Physics C 2017年第6期41卷 110-114页

作者：李昕林海南 Department of Physics Chongqing University Chongqing 401331 China State Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 China

Recent observations show that the electromagnetic fine-structure constant, αe, may vary with space and time. In the framework of finsler spacetime, we propose here an anisotropic cosmological model, in which both spatial and temporal variations of αe are allowed. Our model naturally leads to the dipole structure of αe, and predicts that the dipole amplitude increases with time. We fit our model to the most up-to-date measurements of αe from the quasar absorption lines. It is found that the dipole direction points towards（l, b） =（330.2°±7.3°,-13.0°±5.6°）in galactic coordinates, and the anisotropic parameter is b_0 =（0.47±0.09）×10^-5, which corresponds to a dipole amplitude（7.2±1.4）×10^-8 at redshift z = 0.015. This is consistent with the upper limit of the variation of αe measured in the Milky Way. We also fit our model to Union2.1 type Ia supernovae, and find that the preferred direction of Union2.1 is consistent with the dipole direction of αe.

关键词： finsler spacetime fine-structure constant anisotropy of the Universe

finslerian Perturbation for the ΛCDM Model

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Communications in Theoretical Physics 2014年第6期61卷 781-788页

作者：李昕王赛常哲 Institute of High Energy Physics Theoretical Physics Center for Science Facilities Chinese Academy of Sciences

We present finslerian perturbation for the ∧CDM model, which breaks the isotropic symmetry of the universe. The analysis on the Killing vectors shows that the Randers-finsler spacetime breaks the isotropic symmetry even ff the scalar perturbations of the FRW metric vanish. In Randers-finsler spacetime, the modified geodesic equation deduces a modified Boltzmann equation. We propose a perturbational version of the gravitational field equation in Randers-finsler spacetime, where we have omitted the curvature tensor that does not belong to the base space of the tangent bundle. The gravitational field equations for the gravitational wave are also presented. The primordial power spectrum of the gravitational wave is investigated. We show that the primordial power spectrum for super-horizon perturbations is unchanged. For sub-horizon perturbations, however, the power spectrum is modified.

关键词： ∧CDM perturbations finsler spacetime