dimensional systems. We obtain exact results in the long-wavelength limit with the help of a
hydrodynamic mode!. A heuristic description is also developed to help understanding the
physics behind the plasmon in the three different dimensionalities and a quantnm derivation
is briefty presented in order to corroborate the hydrodynamic results. RESUMEN.
Presentamos de una manera unificada la derivación de la relación de dispersión para …