  We develop a mode coupling theory(MCT) to study the nonequilibrium glass
transition behavior of a mono-disperse mixture of active-passive hard-sphere
particles. The MCT equations clearly demonstrate that the glass transition is
shifted to higher values of total volume fraction when doping a passive system
with active particles. Interestingly, we find that the glass transition point
may show a non-monotonic dependence on the effective diffusivity of the active
component, indicating a nontrivial type of activity induced reentrance
behavior. Analysis based on the nonergodic parameters suggest that the glassy
state at small activity is due to the caging effect, while that at high
activity could result from activity induced dynamic clustering.
