  A modification of Tulsi's quantum search algorithm with intermediate
measurements of the control is presented. In order to analyze the effect of
measurements in quantum searches, a different choice of the angular parameter
is used. The study is performed for several values of time lapses between
measurements, finding close relationships between probabilities and
correlations (Mutual Information and Cumulative Correlation Measure). The order
of this modified algorithm is estimated, showing that for some time lapses the
performance is improved, and became of order $O(N)$ (classical brute force
search) when the measurement is taken in every step. The results indicate a
possible way to analyze improvements to other quantum algorithms using one, or
more, control qubits.
