  We propose a holographic description of cosmic preheating at strong coupling.
In this scenario the energy transfer between the inflaton and matter field is
mimicked by a model of holographic superconductor. An exponential amplification
of the matter field during preheating can be described by the quasi-normal
modes of a metastable "black hole" in the bulk spacetime with an expanding
boundary. Our results reveal that the matter field can be produced continuously
at strong coupling in contrast to the case of weak coupling with a
discontinuous matter growth as inflaton oscillates. Furthermore, the
amplification of matter field has an enhanced dependence on the vacuum
expectation value of the inflaton at strong coupling. By virtue of the proposed
mechanism, physics of the very early universe at an extremely high temperature
right after inflation may become accessible.
