There are known problems with the standard Lorentz-Dirac description of radiation reaction in classical electrodynamics (mass renormalization and its nonuniqueness, preacceleration, runaway solutions and so on, see, for ex., [1-7]). In the literature one can find the opinion that some of that problems are connected with the ”point” description of moving charged particle and the hope that the ma...

We report on a study of the charged-skyrmion or spin-texture excitations which occur in quantum Hall ferromagnets near odd Landau level filling factors. Particle-hole symmetry is used to relate the spin-quantum numbers of charged particle and hole excitations and neutral particle-hole pair excitations. Hartree-Fock theory is used to provide quantitative estimates of the energies of these excita...

We review the physical and cosmological consequences of two possible electromagnetic couplings to the dark sector: (i) a neutral lightest dark-matter particle (LDP) with nonzero electric and/or magnetic dipole moments and (ii) a charged next-to-lightest dark-matter particle (NLDP) which decays to a neutral LDP. For scenario (i) we find that a relatively light particle with mass between a few Me...

The identity of classical motion is established for two physically different models, one of which is the relativistic particle with torsion, whose action contains higher derivatives and which is the effective system for the statistically charged particle interacting with the Chern-Simons U(1) gauge field, and another is the (2+1)dimensional relativistic charged particle in external constant ele...

An emerging paradigm for the dissipation of magnetic turbulence in the supersonic solar wind is via localized quasi2D small-scale magnetic island reconnection processes. An advection-diffusion transport equation for a nearly isotropic particle distribution describes particle transport and energization in a region of interacting magnetic islands [1; 2]. The dominant charged particle energization...