  Although quantum walks exhibit peculiar properties that distinguish them from
random walks, classical behavior can be recovered in the asymptotic limit by
destroying the coherence of the pure state associated to the quantum system.
Here I show that this is not the only way: I introduce a quantum walk driven by
an inhomogeneous, time-dependent coin operator, which mimics the statistical
properties of a random walk at all time scales. The quantum particle undergoes
unitary evolution and, in fact, the high correlation evidenced by the
components of the wave function can be used to revert the outcome of an
accidental measurement of its chirality.
