  We show that a one dimensional disordered conductor with correlated disorder
has an extended state and a Landauer resistance that is non-zero in the limit
of infinite system size in contrast to the predictions of the scaling theory of
Anderson localization. The delocalization transition is not related to any
underlying symmetry of the model such as particle-hole symmetry. For a wire of
finite length the effect manifests as a sharp transmission resonance that
narrows as the length of the wire is increased. Experimental realizations and
applications are discussed including the possibility of constructing a narrow
band light filter.
