  Transition-metal-oxide (TMO) heterostructures are promising candidates for
building photon-harvesting devices which can exploit optimal quantum transport
of charge excitations generated by light absorption. Here we address the
explicit role of an electric field on the quantum transport properties of
photo-excitations subject to dephasing in one-dimensional chains coupled to a
continuum of states acting as a sink. We show that the average transfer time to
the sink is optimized for suitable values of both the coupling strength to the
sink and the electric field, thus fully exploiting the coherence-enhanced
efficiency in the quantum transport regime achievable in few monolayers TMO
heterostructures. The optimal coupling to the continuum remains approximately
the same as that in absence of electric field and is characterizing the
Superradiant Transition. On the other hand, the optimal electric field for
which we provide estimates using an analytical expression is dependent on the
initial state.
