  We consider the standard double well setup extended with a laser beam in the
center to create a "triple well" potential. The beam in the center is much more
narrow than the barrier, and it creates a tunable depth well which can support
a localized state in the middle. We show that the presence of the localized
state in the central well changes the sign of tunneling between the left and
right wells and therefore controls the fixed point dynamics of the bosonic
Josephson junction.
