  A universal entangler is quantum gate able to transform any disentangled
state in an entangled state. Although universal entanglers are abundant in
arbitrary high dimensional spaces, to verify if a quantum gate is a universal
entangler is a hard task since it is not known which property of the unitary
matrix is responsible for such behavior. In this direction, the present work
shows the results of an algorithm based on differential evolution that tests
universal entanglers in C3xC4 and C4xC4. We present two good candidates for
each cited space and we show that a candidate found in the literature is not a
universal entangler.
