  Optically-controlled exciton dynamics in coupled quantum dots is studied. We
show that the maximally entangled Bell states and Greenberger-Horne-Zeilinger
(GHZ) states can be robustly generated by manipulating the system parameters to
be at the avoided crossings in the eigenenergy spectrum. The analysis of
population transfer is systematically carried out using a dressed-state
picture. In addition to the quantum dot configuration that have been discussed
by Quiroga and Johnson [Phys. Rev. Lett. \QTR{bf}{83}, 2270 (1999)], we show
that the GHZ states also may be produced in a ray of three quantum dots with a
shorter generation time.
