Dark energy as a battery for magnetic field generation in plasmas

TL;DR

This paper demonstrates that dark energy, modeled as a cosmological constant, can generate magnetic fields in plasmas around black holes through a general-relativistic battery mechanism, linking dark energy to cosmic magnetism.

Contribution

It introduces a novel mechanism where dark energy acts as a gravitational source for magnetic field generation in plasmas near black holes.

Findings

Dark energy can generate magnetic fields in plasma environments.

The mechanism operates in the far regions of Schwarzschild-de Sitter black holes.

Dark energy's role in cosmic magnetism is theoretically supported.

Abstract

It is shown that in the spacetime dominated by a cosmological constant, in the far region of a Schwarzschild-de Sitter black hole, a seed magnetic field can be generated in an ambient plasma (in a state of no magnetic field) by a general-relativistic battery, which depends on the interaction of spacetime curvature with inhomogeneous plasma thermodynamics. Thus, at large distances, dark energy becomes the only gravitational source for magnetic field generation. This allows a mechanism that make dark energy manifest through its conversion to cosmic magnetic fields.