Persistent currents in a Moebius ladder are shown to be very sensitive to the effects of intrachain interactions on the hopping of electrons between chains. Their periodicity as a function of flux is doubled for strong enough repulsive interactions because electrons cannot hop coherently between the chains and have to travel along the full edge of the Moebius ladder, thus encircling the flux tw...

We explore the ‘Moebius disjointness property’ in the special context of rank-one transformations and verify this phenomenon for many of the ‘classical’ models. (0). Introduction and Preliminaries This note is a follow up on [B-S-Z]. Recall that the general problem considered is the orthogonality of the Moebius sequence {μ(n);n ∈ Z+} with orbits of dynamical systems of zero (topological) entrop...

158 This chapter presents a set of issues and methods related to studying emotional functioning in neurological patients. It incorporates discussions of the advantages and disadvantages of two primary paradigms for studying neural substrates of human emotion (patient studies and activation studies); of the importance of studying multiple emotion processes, emotion types, and emotion response sy...