title: Bosonic and fermionic dipoles on a ring.
abstract: We show that dipolar bosons and fermions confined in a quasi-one-dimensional ring trap exhibit a rich variety of states because their interaction is inhomogeneous. For purely repulsive interactions, with increasing strength of the dipolar coupling there is a crossover from a gaslike state to an inhomogeneous crystal-like one. For small enough angles between the dipoles and the plane of the ring, there are regions with attractive interactions, and clustered states can form.
authors.affiliation: The Niels Bohr International Academy, The Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen, Denmark. zoellner@nbi.dk
authors.forename: Sascha
authors.initials: S
authors.lastname: Zöllner
authors.forename: G M
authors.initials: GM
authors.lastname: Bruun
authors.forename: C J
authors.initials: CJ
authors.lastname: Pethick
authors.forename: S M
authors.initials: SM
authors.lastname: Reimann