  We investigate the tunneling properties of a two-species few-boson mixture in
a one-dimensional triple well and harmonic trap. The mixture is prepared in an
initial state with a strong spatial correlation for one species and a complete
localization for the other species. We observe a correlation-induced tunneling
process in the weak interspecies interaction regime. The onset of the
interspecies interaction disturbes the spatial correlation of one species and
induces tunneling among the correlated wells. The corresponding tunneling
properties can be controlled by the spatial correlations with an underlying
mechanism which is inherently different from the well known resonant tunneling
process. We also observe the correlated tunneling of both species in the
intermediate interspecies interaction regime and the tunneling via higher band
states for strong interactions.
