Brownian Dynamics of charged particles in a constant magnetic field

TL;DR

This paper introduces numerical algorithms for simulating the Brownian motion of charged particles under magnetic fields, accounting for damping and magnetic effects, with demonstrated accuracy and stability for complex systems.

Contribution

The paper presents new algorithms that accurately simulate charged particle Brownian dynamics in magnetic fields, suitable for various dispersed systems and molecular dynamics thermostats.

Findings

Algorithms show high accuracy in simulations.

Algorithms maintain stability over long times.

Applicable to complex plasma and colloidal systems.

Abstract

Numerical algorithms are proposed for simulating the Brownian dynamics of charged particles in an external magnetic field, taking into account the Brownian motion of charged particles, damping effect and the effect of magnetic field self-consistently. Performance of these algorithms is tested in terms of their accuracy and long-time stability by using a three-dimensional Brownian oscillator model with constant magnetic field. Step-by-step recipes for implementing these algorithms are given in detail. It is expected that these algorithms can be directly used to study particle dynamics in various dispersed systems in the presence of a magnetic field, including polymer solutions, colloidal suspensions and, particularly complex (dusty) plasmas. The proposed algorithms can also be used as thermostat in the usual molecular dynamics simulation in the presence of magnetic field.