Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On application of stochastic differential equations for simulation of
  nonlinear wave-particle resonant interactions   Long-term simulations of energetic electron fluxes in many space plasma
systems require accounting for two groups of processes with well separated
time-scales: microphysics of electron resonant scattering by electromagnetic
waves and electron adiabatic heating/transport by mesoscale plasma flows.
Examples of such systems are Earth's radiation belts and Earth's bow shock,
where ion-scale plasma injections and cross-shock electric fields determine the
general electron energization, whereas electron scattering by waves relax
anisotropy of electron distributions and produces small populations of
high-energy electrons. The applicability of stochastic differential equations
is a promising approach for including effects of resonant wave-particle
interaction into codes of electron tracing in global models. This study is
devoted to test of such equations for systems with nondiffusive wave-particle
interactions, i.e. systems with nonlinear effects of phase trapping and
bunching. We consider electron resonances with intense electrostatic
whistler-mode waves often observed in the Earth's radiation belts. We
demonstrate that nonlinear resonant effects can be described by stochastic
differential equations with the non-Gaussian probability distribution of random
variations of electron energies.

17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph