  Rapid and efficient preparation, manipulation and transfer of quantum states
through an array of quantum dots (QDs) is a demanding requisite task for
quantum information processing and quantum computation in solid-state physics.
Conventional adiabatic protocols, as coherent transfer by adiabatic passage
(CTAP) and its variations, provide slow transfer prone to decoherence, which
could lower the fidelity to some extent. To achieve the robustness against
decoherence, we propose a protocol of speeding up the adiabatic charge transfer
in multi-QD systems, sharing the concept of "Shortcuts to Adiabaticity" (STA).
We first apply the STA techniques, including the counterdiabatic driving and
inverse engineering, to speed up the direct (long range) transfer between edge
dots in triple QDs. Then, we extend our analysis to a multi-dot system. We show
how by implementing the modified pulses, fast adiabatic-like charge transport
between the outer dots can be eventually achieved without populating
intermediate dots. We discuss as well the dependence of the transfer fidelity
on the operation time in the presence of dephasing. The proposed protocols for
accelerating adiabatic charge transfer directly between the outer dots in a QD
array offers a robust mechanism for quantum information processing, by
minimizing decoherence and relaxation processes.
