Nonlinear electrostatics: steps towards a neoclassical electron model

TL;DR

This paper explores nonlinear electrostatics in a pre-metric framework, analyzing how different quantum-inspired constitutive laws influence electric fields and revisiting classical electron models in light of quantum physics.

Contribution

It introduces a pre-metric formulation of electrostatics where nonlinearity is confined to algebraic equations and applies this to quantum-derived constitutive laws, redefining electron modeling.

Findings

Equations remain linear in differential form despite nonlinear constitutive laws.

Solutions include classical examples like Coulomb and dipole fields.

Quantum-origin laws like Born-Infeld and Heisenberg-Euler are incorporated.

Abstract

The equations of electrostatics are presented in pre-metric form, and it is pointed out that if the origin of the nonlinearity is the constitutive law for the medium then the differential equations themselves remain linear, while the nonlinearity is confined to an algebraic equation. These equations are solved for a general class of electric fields that include the common textbook examples, namely, fields that are adapted to a coordinate vector field. The special forms that they then take for particular electric constitutive laws of quantum origin, namely, the constitutive laws derived from the Born-Infeld and Heisenberg-Euler Lagrangians, are then discussed. Finally, the classical problem of modeling the electron is redefined in light of the established facts of quantum physics.