On the Electrodynamics with Faster-Than-Light Motion
Gennadii A. Kotel'nikov
备注:
11 pages
发表信息:
Has the Last Word Been Said on Classical Electrodynamics? - New Horizons, Editors: A. Chubykalo, V. Onoochin, A. Espinoza, R. Smirnov-Rueda, Rinton Press, 2004, 71-81
The version of electrodynamics is constructed in which faster-than-light motions of fields and particles with real masses are possible. Transformational properties of 3-velocity, momentum, energy and electromagnetic field are presented in addition to the paper physics/0405085.
Forces between electric charges in motion: Rutherford scattering, circular Keplerian orbits, action-at-a-distance and Newton's third law in relativistic classical electrodynamics
The symmetric tensor energy-impulse of interaction of collective of electric charges with an electromagnetic field is received. A system of covariant energy and momentum conservation equations or a system of equations for the collective motion of charged particles is derived from this tensor. From this system Expressions are derived for collective electrodynamics forces. From the energy-momentum tensor derived the tensor of collective electrodynamics forces is.
We show that the uniform motion of a homogeneous distribution of electric charge can be stable or unstable depending on its geometry. When the electrodynamic body is perturbed from a state of rest, it starts to perform fast oscillations, irrespective of the frequency of the perturbation. This nonlinear oscillation is the result of the feedback interaction between Coulombian and radiative fields. The resulting spontaneous symmetry breaking of the Lorentz group implies that the principle of inertia only holds on average and suggests that the default state of matter is not necessarily uniform mot…
The Lorentz-Abraham-Dirac equations (LAD) may be the most commonly accepted equation describing the motion of a classical charged particle in its electromagnetic field. However, it is well known that they bare several problems. In particular, almost all solutions are dynamically unstable, and therefore, highly questionable. The question remains whether better equations of motion than LAD can be found to describe the dynamics of charges in the electromagnetic fields. In this paper we present an approach to derive such equations of motions, taking as input the Maxwell equations and a particular …
In this work, the theory of second gradient electrodynamics, which is an important example of generalized electrodynamics, is proposed and investigated. Second gradient electrodynamics is a gradient field theory with up to second-order derivatives of the electromagnetic field strengths in the Lagrangian density. Second gradient electrodynamics possesses a weak nonlocality in space and time. In the framework of second gradient electrodynamics, the retarded Green functions, first-order derivatives of the retarded Green functions, retarded potentials, retarded electromagnetic field strengths, gen…
In this paper, we give the covariant formulation of second gradient electrodynamics, which is a generalized electrodynamics of second order including derivatives of higher order. The relativistic form of the field equations, the energy-momentum tensor and the Lorentz force density are presented. For an electric point charge, the generalized Lienard-Wiechert potentials and the corresponding electromagnetic field strength tensor are given as retarded integral expressions. Explicit formulas for the electromagnetic potential vector and electromagnetic field strength tensor of a uniformly moving po…
Radiation-Reaction on the Straight-Line Motion of a Point Charge accelerated by a constant applied Electric Field in an Electromagnetic Bopp-Landé-Thomas-Podolsky vacuum
Lancaster University(兰卡斯特大学);Rutgers, The State University of New Jersey(新泽西州立罗格斯大学)
Continuum Electrodynamics of a Piecewise-Homogeneous Linear Medium
能量-动量张量和张量连续性方程作为连续流的能量、线动量和角动量的守恒定律。先前,我们推导了覆盖有梯度折射率减反射膜的均匀线性电介质中的宏观电磁场的运动方程(J. Math Phys.55,042901(2014))。这些结果是一致的电磁张量连续性方程的限制,反射和伴随的表面力是可以忽略不计的,从而满足条件的畅通无阻的流动在一个封闭的系统。在这里,我们采取下一步,并推导出运动方程的宏观领域的限制情况下,一个分段均匀的简单线性电介质。在两种不同的均匀线性材料之间的界面上的辐射表面力的存在意味着能量-动量形式主义必须被修改,以处理单独的均匀介质中的领域连接的边界条件在界面上。我们证明了明确的分离的总动量成一个字段组件和材料运动组件,我们推导出辐射压力,将动量从字段的材料,我们推导出电磁连续性方程的分段均匀的电介质,我们提供了一个清晰的重新解释琼斯和理查兹实验。
We consider the dynamics of a classical charge in flat spacetime of six dimensions. The mass shell relation of a free charge admits nonlinear oscillations. Having analyzed the problem of on eigenvalues and eigenvectors of Faraday tensor, we establish the algebraic structure of electromagnetic field in 6D. We elaborate the classification scheme based on three field's invariants. Using the basic algebraic properties of the electromagnetic field tensor we analyze the motion of a charge in constant electromagnetic field. Its world line is a combination of hyperbolic and circular orbits which lie i…
The paradox of a field of a moving locked charge (confined in a closed space) is considered and solved with the use of the integral Maxwell equations. While known formulas obtained for instantaneous fields of charges moving along straight and curved lines are fully correct, measurable quantities are average electric and magnetic fields of locked charges. It is shown that the average electric field of locked charges does not depend on their motion. The average electric field of protons moving in nuclei coincides with that of protons being at rest and having the same spatial distribution of the …