  Since holography yields exact results, even in situations where perturbation
theory is not applicable, it is an ideal framework for modeling strongly
correlated systems. We extend previous holographic methods to take the
dynamical charge response into account and use this to perform the first
holographic computation of the dispersion relation for plasmons. As the
dynamical charge response of strange metals can be measured using the new
technique of momentum-resolved electron energy-loss spectroscopy (M-EELS),
plasmon properties are the next milestone in verifying predictions from
holographic models of new states of matter.
