Cooperative Electromagnetic Effects

TL;DR

This review discusses how the Scale Separation Approach effectively analyzes complex nonlinear collective electromagnetic phenomena in nonequilibrium systems, revealing novel effects like collective light liberation and turbulent photon filamentation.

Contribution

It introduces and demonstrates the general applicability of the Scale Separation Approach to various nonequilibrium electromagnetic phenomena, highlighting its effectiveness in solving complex nonlinear problems.

Findings

Demonstration of the Scale Separation Approach's effectiveness

Analysis of phenomena like Collective Liberation of Light

Identification of new physical effects in nonequilibrium systems

Abstract

Collective phenomena in strongly nonequilibrium systems interacting with electromagnetic field are considered. Such systems are described by complicated nonlinear differential or integro-differential equations. The aim of this review is to show that many nonlinear collective phenomena can be successfully treated by a recently developed method called the Scale Separation Approach whose name is due to the idea of separating different characteristic space-time scales existing in nonequilibrium statistical systems. This approach is rather general and can be applied to various nonequilibrium physical problems, several of which are discussed here. The problems considered not only serve as illustrations of the method but are quite important by themselves presenting interesting physical effects, such as Collective Liberation of Light, Turbulent Photon Filamentation, Superradiant Spin Relaxation, Negative Electric Current, and Magnetic Semiconfinement of Atoms.