Negative Refractive Index in Hydrodynamical Systems

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 frequencies 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.

Publication year:2013

Keywords:Phenomenological models, Holography and quark-gluon plasmas, Holography and condensed matter physics, AdS/CMT