  The transport of Bloch electrons under strong fields is traditionally
understood through two mechanisms: intraband Bloch oscillations and interband
Zener tunneling. Here we propose a new oscillation mechanism induced by the
interband quantum metric, which would significantly affect the electron
dynamics under strong fields. By considering the multiband dynamics to the
second order of the density matrix, we reveal that quantum metric-induced
oscillations (QMO) persist regardless of band dispersion, even in exactly flat
bands. The resultant drift current can reach a magnitude comparable to the
Bloch oscillations-induced drift current in systems where interband tunneling
is negligible. Notably, the {QMO}-induced drift current increases linearly with
electric field strength under the constraints of time-reversal or
spatial-inversion symmetry, emerging as the primary delocalized current. We
further show that both one-dimensional and two-dimensional superlattices are
potential platforms for investigating QMO.
