Maxwell-scalar device based on the electric dipole

TL;DR

This paper explores a Maxwell-scalar model where a scalar field non-minimally couples to the electromagnetic field, leading to exact solutions that suggest new ways to understand charge confinement and electromagnetic phenomena in complex media.

Contribution

It introduces a novel Maxwell-scalar framework with exact solutions, revealing how permittivity can encapsulate charges at high values, unlike standard models.

Findings

Exact solutions for the Maxwell-scalar system

Permittivity can encapsulate charges at high values

Potential implications for astrophysics and radiation processes

Abstract

In this work we study the electric field of a dipole immersed in a medium with permittivity controlled by a real scalar field which is non-minimally coupled to the Maxwell field. We model the system with an interesting function, which allows the presence of exact solutions, describing the possibility of the permittivity to encapsulate the charges at very high values, giving rise to an effect that is not present in the standard situation. The results are of direct interest to applications for emission and absorption of radiation, and may motivate new studies concerning binary stars and black holes in gravity scenarios of current interest.