  An electric field quench, a suddenly applied electric field, can induce
nontrivial dynamics in confining systems which may lead to thermalization as
well as a deconfinement transition. In order to analyze this nonequilibrium
transitions,we use the AdS/CFT correspondence for $\mathcal{N}=2$
supersymmetric QCD that has a confining meson sector. We find that the electric
field quench causes the deconfinement transition even when the magnitude of the
applied electric field is smaller than the critical value for the static case
(which is the QCD Schwinger limit for quark-antiquark pair creation). The time
dependence is crucial for this phenomenon, and the gravity dual explains it as
an oscillation of a D-brane in the bulk AdS spacetime. Interestingly, the
deconfinement time takes only discrete values as a function of the magnitude of
the electric field. We advocate that the new deconfinement phenomenon is
analogous to the exciton Mott transition.
