Chaotic Dynamics of Test Particle in the Gravitational Field with Magnetic Dipoles  

作　　者：CHENJu-Hua WANGYong-Jiu 

机构地区：[1]CollegeofPhysicsandInformationScience,InstituteofPhysics,HunanNormalUniversity,Changsha410081,China

出　　处：《Communications in Theoretical Physics》2003年第3X期301-304,共4页理论物理通讯（英文版）

摘　　要：We investigate the dynamics of the test particle in the gravitational field with magnetic dipoles in this paper. At first we study the gravitational potential by numerical simulations. We find, for appropriate parameters, that there are two different cases in the potential curve, one of which is the one-well case with a stable critical point, and the other is the three-well case with three stable critical points and two unstable ones. As a consequence, the chaotic motion will rise. By performing the evolution of the orbits of the test particle in the phase space, we find that the orbits of the test particle randomly oscillate without any periods, even sensitively depending on the initial conditions and parameters.By performing Poincaré sections for different values of the parameters and initial conditions, we further conform that the chaotic motion of the test particle in the field with magnetic dipoles becomes even obvious as the value of the magnetic dipoles increases.

关 键 词：混沌 数值模拟 混沌动力学 磁偶极子 粒子动力学 测试 POINCARÉ截面 

分 类 号：O415.5[理学—理论物理] O572.21[理学—物理]