  We propose a coherent control scheme based on the optical Stark effect in
optically generated excitons in quantum dot molecules (QDMs). We show that, by
the combined action of voltage bias detuning sweeps and Rosen-Zener pulsed
interactions, it is possible to dynamically generate and modify an anticrossing
gap that emerges between the dressed energy levels of long-lived, spatially
indirect excitons. We perform numerical and analytic non-perturbative
calculations based on the Bloch-Feshbach formalism, which demonstrate that this
effect induces a mechanism of coherent population trapping of indirect excitons
in QDMs. Our results show that it is possible to perform an all-optical
implementation of indirect-excitonic qubit operations, such as the Pauli-X and
Hadamard quantum gates, across two defined axis of the Bloch Sphere.
