共查询到18条相似文献,搜索用时 93 毫秒
1.
2.
3.
4.
5.
带电粒子垂直进入匀强磁场中做匀速圆周运动与现代科技联系紧密,越来越受到高考命题专家的青睐。就历年高考的结果来看,学生在此类题上得分率并不太高,究其原因,学生不能科学、准确地画出粒子运动轨迹图,不能从表示粒子运动的几何图中找到半径、圆心角与其他几何量的关系。本文就圆周运动中圆心的确定方法进行归类分析,以便于同学们从总体上把握。 相似文献
6.
物体做圆周运动时,切向有分力产生切向加速度,与物体速度方向在同一直线上,它改变物体速度的大小;指向圆心的分力向心力产生向心加速度.与速度方向垂直且指向圆心,它改变速度的方向;同时具有向心加速度和切向加速度的圆周运动就是变速圆周运动.在竖直面内的圆周运动是典型的变速圆周运动.对于圆周运动物体通过最高点和最低点的情况. 相似文献
7.
本文发展了一种描述锁模激光脉冲序列输出的全量子理论.采用“相干叠加”模型,即认为从多模相干态光场不同模吸收光子后的原子态是相干的,耦合形成相干组合态.考虑锁模激光各模式间相位关系.用多模相干态描述光场,应用预解算符和投影算符推导演化算符,使本方法可统一处理锁模激光脉冲序列输出及原子的共振多光子过程. 相似文献
8.
9.
10.
11.
The study of charged test particle dynamics in the combined black hole gravitational field and magnetic field around it could provide important theoretical insight into astrophysical processes around such compact object. We have explored the orbital and epicyclic motion of charged test particles in the background of non-rotating Einstein-Æther black holes in the presence of external uniform magnetic field. We numerically integrate the equations of motion and analyze the trajectories of the charged test particles. We examined the stability of circular orbits using effective potential technique and study the characteristics of innermost stable circular orbits. We analyze the key features of quasi-harmonic oscillations of charged test particles nearby the stable circular orbits in an equatorial plane of the black hole, and investigate the radial profiles of the frequencies of latitudinal as well as radial harmonic oscillations in dependence on the strength of magnetic field, mass of the black hole and dimensionless coupling constants of the theory. We demonstrate that the magnetic field and dimensionless parameters of the theory have strong influence on charged particle motion around Einstein-Æther black holes. 相似文献
12.
As a generalization of the optical circular states, elliptical states which are quantum superposition of coherent states on an ellipse in the α plane are constructed. The statistical properties of the states are investigated by using sub-Poissonian photon statistics, quadrature squeezing, Wigner function and phase distribution. It is shown that the elliptical states exhibit stronger quadrature squeezing. The interference fringes between the coherent states form the elliptic annuli of Fock states in the Wigner function picture. The phase distribution is no longer uniform as the circular states. An experimental scheme is proposed for generating equidistant coherent-state superpositions on an ellipse for the motion of the center of mass of a trapped ion. 相似文献
13.
Coherent states for the Landau system (planar charged particle moving in a uniform magnetic field) are developed. It is convenient to use these states to describe the circular motion of the charged particle. The results obtained do not depend on gauges. 相似文献
14.
The symplectic tomograms of coherent states of a charged particle moving in a constant uniform magnetic field are obtained
in explicit form. The tomograms are shown to coincide with normal probability distributions of two random variables. The means
and dispersions of the variables are found and expressed in terms of means and dispersions of the charged particle coordinates
and momenta. The characteristic function of the tomographic probability distribution is found. The center of mass tomogram
of the coherent state of charge in magnetic field is also found and the relation of the symplectic tomogram and the center
of mass tomogram is established. 相似文献
15.
16.
Coupled squeezed states for
the Landau system (planar charged particle moving in a uniform magnetic field)are
built.These coupled squeezed states adn decoupled squeezed Landau states give some
information about the circjlar motion of charged particles resprctively. 相似文献
17.
A solution to a version of the Stieltjes moment problem is presented. Using this solution, we construct a family of coherent states of a charged particle in a uniform magnetic field. We prove that these states form an overcomplete set that is normalized and resolves the unity. By the help of these coherent states we construct the Fock-Bergmann representation related to the particle quantization. This quantization procedure takes into account a circle topology of the classical motion. 相似文献
18.
R. Kaya 《General Relativity and Gravitation》2007,39(2):211-221
We study the effect of an external magnetic field on the stability of circular motion around a five dimensional Myers–Perry
metric. Using the Hamilton–Jacobi formalism we derive the effective potential for the radial motion of charged particles around
a five dimensional rotating black hole in a uniform magnetic field. We show that there are stable circular orbits around a
five dimensional rotating black hole immersed in a uniform magnetic field. 相似文献