131 citations · 470 across the 13 of their papers we have counts for
14 papers
From Spray to Metric: The Geometric Construction of the Jacobi Metric
Zonghai Li
This paper develops a systematic approach to the geometrization of dynamics from the viewpoint of the geodesic equation. The method promotes a semispray to a spray through the impo…
The bending of a straight line
Zonghai Li, Xiao-Jun Gao
In gravitational lensing under the weak-field approximation, the usual viewpoint is that light bending measures how a ray deviates from a straight line in Euclidean space. In this…
Gravitational Lensing Using Werner's Method in Cartesian-like Coordinates
Zonghai Li
The Gibbons-Werner method for calculating deflection angles using the Gauss-Bonnet theorem and optical/Jacobi metric has become widely popular in recent years. Werner extended this…
A Novel Method for Calculating Deflection Angle with Finite-Distance Correction
Zonghai Li
In recent study in Ref.[7] (arXiv: 2401.12525), we have introduced a method aimed at calculating the weak-field asymptotic deflection angle. This method offers an efficient computa…
A Novel Method for Calculating Deflection Angle
Zonghai Li
In this paper, we introduce a method for calculating the deflection angle in the weak-field approximation, applicable to both null and timelike rays. By combining the trajectory eq…
Deflection of charged signals in a dipole magnetic field in Schwarzschild background using Gauss-Bonnet theorem
Zonghai Li, Wei Wang, Junji Jia
This paper studies the deflection of charged particles in a dipole magnetic field in Schwarzschild spacetime background in the weak field approximation. To calculate the deflection…
Kerr-Newman-Jacobi geometry and the deflection of charged massive particles
Zonghai Li, Junji Jia
In this paper, we investigate the deflection of a charged particle moving in the equatorial plane of Kerr-Newman spacetime, focusing on weak field limit. To this end, we use the Ja…
Deflection of charged massive particles by a four-dimensional charged Einstein-Gauss-Bonnet black hole
Zonghai Li, Yujie Duan, Junji Jia
Based on the Jacobi metric method, this paper studies the deflection of a charged massive particle by a novel four-dimensional charged Einstein-Gauss-Bonnet black hole. We focus on…
Circular orbit of a particle and weak gravitational lensing
Zonghai Li, Guodong Zhang, Ali Övgün
The purpose of this paper is twofold. First, we introduce a geometric approach to study the circular orbit of a particle in static and spherically symmetric spacetime based on Jaco…
Finite-distance gravitational deflection of massive particles by the Kerr-like black hole in the bumblebee gravity model
Zonghai Li, Ali Övgün
In this paper, we study the weak gravitational deflection angle of relativistic massive particles by the Kerr-like black hole in the bumblebee gravity model. In particular, we focu…
Kerr black hole surrounded by a cloud of strings and its weak gravitational lensing in Rastall gravity
Zonghai Li, Tao Zhou
In this paper, an exact solution of Kerr black hole surrounded by a cloud of strings in Rastall gravity is obtained by Newman-Janis algorithm without complexification, and the infl…
The finite-distance gravitational deflection of massive particles in stationary spacetime: a Jacobi metric approach
Zonghai Li, Junji Jia
In this paper, we study the weak gravitational deflection of relativistic massive particles for a receiver and source at finite distance from the lens in stationary, axisymmetric a…
Equivalence of Gibbons-Werner method to geodesics method in the study of gravitational lensing
Zonghai Li, Tao Zhou
The Gibbons-Werner method where the Gauss-Bonnet theorem is applied to study the gravitational deflection angle has received much attention recently. In this paper, we study the eq…
Gravitational deflection of relativistic massive particles by wormholes
Zonghai Li, Guansheng He, Tao Zhou
In this paper, the gravitational deflection of relativistic massive particles up to the second post-Minkowskian order by static and spherically symmetric wormholes is investigated…