  We analyze a model where a closed $V$ system is excited by two uncorrelated
partially coherent fields. We use a collisionally broadened CW laser, which is
a good model for an experimentally realizable partially coherent field, and
show that it is possible to generate excited state coherences even if the two
fields are uncorrelated. This transient coherence can be increased if splitting
between the excited states is reduced relative to the radiation coherence time,
$\tau_{d}$. For small excited state splitting, one can use this scheme to
generate a long lived coherent response in the system.

Quantum Physics