  In recent years, photon drag has attracted enormous attention owing to both
fundamental and practical interests. In this paper, by presenting a
density-matrix approach, we have theoretically demonstrated an enhanced photon
drag in a moving atomic medium. By incorporating of the interference of
spontaneous emission, properties of the medium can be easily controlled by the
relative phase of applied fields so that a large group index along with a
transparency or even a gain can be achieved. As photon drag is proportional to
group index, the enhancement can be also found in the dragging effect.
Applications of the enhanced dragging effect can be found for efficient
modulators of light, position control, and detection of slow motion.
