Negative Refractive Index in Hydrodynamical Systems

TL;DR

This paper demonstrates that hydrodynamical systems with finite charge density can exhibit negative refractive index for low frequency electromagnetic waves, with potential applications in quark-gluon plasma physics.

Contribution

It reveals the generic presence of negative refractive index in hydrodynamical systems with finite charge density, linking electromagnetic phenomena to hydrodynamics.

Findings

Negative refractive index occurs in hydrodynamical systems with charge density.

Energy flux and phase velocity propagate in opposite directions.

Potential applications in quark-gluon plasma physics.

Abstract

We discuss the presence of exotic electromagnetic phenomena in systems with finite charge density which are described by hydrodynamics. We show that such systems generically have negative refractive index for low frequency electromagnetic waves, i.e. the energy flux and the phase velocity of the wave propagate in opposite directions. We comment on possible phenomenological applications, focusing on the Quark Gluon Plasma.